Document (#38659)

Author
Kousha, K.
Thelwall, M.
Title
¬An automatic method for extracting citations from Google Books
Source
Journal of the Association for Information Science and Technology. 66(2015) no.2, S.309-320
Year
2015
Abstract
Recent studies have shown that counting citations from books can help scholarly impact assessment and that Google Books (GB) is a useful source of such citation counts, despite its lack of a public citation index. Searching GB for citations produces approximate matches, however, and so its raw results need time-consuming human filtering. In response, this article introduces a method to automatically remove false and irrelevant matches from GB citation searches in addition to introducing refinements to a previous GB manual citation extraction method. The method was evaluated by manual checking of sampled GB results and comparing citations to about 14,500 monographs in the Thomson Reuters Book Citation Index (BKCI) against automatically extracted citations from GB across 24 subject areas. GB citations were 103% to 137% as numerous as BKCI citations in the humanities, except for tourism (72%) and linguistics (91%), 46% to 85% in social sciences, but only 8% to 53% in the sciences. In all cases, however, GB had substantially more citing books than did BKCI, with BKCI's results coming predominantly from journal articles. Moderate correlations between the GB and BKCI citation counts in social sciences and humanities, with most BKCI results coming from journal articles rather than books, suggests that they could measure the different aspects of impact, however.
Content
Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23170/abstract.
Theme
Informetrie
Object
Google Books

Similar documents (author)

  1. Kousha, K.; Thelwall, M.: Google Scholar citations and Google Web/URL citations : a multi-discipline exploratory analysis (2007) 5.41 
    5.4077525 = sum of:
  5.4077525 = sum of:
    1.9583232 = weight(author_txt:thelwall in 337) [ClassicSimilarity], result of:
      1.9583232 = score(doc=337,freq=1.0), product of:
        0.5654825 = queryWeight, product of:
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.08164394 = queryNorm
        3.4631014 = fieldWeight in 337, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.5 = fieldNorm(doc=337)
    3.4494293 = weight(author_txt:kousha in 337) [ClassicSimilarity], result of:
      3.4494293 = score(doc=337,freq=1.0), product of:
        0.8247603 = queryWeight, product of:
          1.2076868 = boost
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.08164394 = queryNorm
        4.1823416 = fieldWeight in 337, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.5 = fieldNorm(doc=337)
  2. Kousha, K.; Thelwall, M.: How is science cited on the Web? : a classification of google unique Web citations (2007) 5.41 
    5.4077525 = sum of:
  5.4077525 = sum of:
    1.9583232 = weight(author_txt:thelwall in 586) [ClassicSimilarity], result of:
      1.9583232 = score(doc=586,freq=1.0), product of:
        0.5654825 = queryWeight, product of:
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.08164394 = queryNorm
        3.4631014 = fieldWeight in 586, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.5 = fieldNorm(doc=586)
    3.4494293 = weight(author_txt:kousha in 586) [ClassicSimilarity], result of:
      3.4494293 = score(doc=586,freq=1.0), product of:
        0.8247603 = queryWeight, product of:
          1.2076868 = boost
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.08164394 = queryNorm
        4.1823416 = fieldWeight in 586, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.5 = fieldNorm(doc=586)
  3. Thelwall, M.; Kousha, K.: Online presentations as a source of scientific impact? : an analysis of PowerPoint files citing academic journals (2008) 5.41 
    5.4077525 = sum of:
  5.4077525 = sum of:
    1.9583232 = weight(author_txt:thelwall in 1614) [ClassicSimilarity], result of:
      1.9583232 = score(doc=1614,freq=1.0), product of:
        0.5654825 = queryWeight, product of:
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.08164394 = queryNorm
        3.4631014 = fieldWeight in 1614, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.5 = fieldNorm(doc=1614)
    3.4494293 = weight(author_txt:kousha in 1614) [ClassicSimilarity], result of:
      3.4494293 = score(doc=1614,freq=1.0), product of:
        0.8247603 = queryWeight, product of:
          1.2076868 = boost
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.08164394 = queryNorm
        4.1823416 = fieldWeight in 1614, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.5 = fieldNorm(doc=1614)
  4. Kousha, K.; Thelwall, M.: Assessing the impact of disciplinary research on teaching : an automatic analysis of online syllabuses (2008) 5.41 
    5.4077525 = sum of:
  5.4077525 = sum of:
    1.9583232 = weight(author_txt:thelwall in 2383) [ClassicSimilarity], result of:
      1.9583232 = score(doc=2383,freq=1.0), product of:
        0.5654825 = queryWeight, product of:
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.08164394 = queryNorm
        3.4631014 = fieldWeight in 2383, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.5 = fieldNorm(doc=2383)
    3.4494293 = weight(author_txt:kousha in 2383) [ClassicSimilarity], result of:
      3.4494293 = score(doc=2383,freq=1.0), product of:
        0.8247603 = queryWeight, product of:
          1.2076868 = boost
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.08164394 = queryNorm
        4.1823416 = fieldWeight in 2383, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.5 = fieldNorm(doc=2383)
  5. Kousha, K.; Thelwall, M.: Google book search : citation analysis for social science and the humanities (2009) 5.41 
    5.4077525 = sum of:
  5.4077525 = sum of:
    1.9583232 = weight(author_txt:thelwall in 2946) [ClassicSimilarity], result of:
      1.9583232 = score(doc=2946,freq=1.0), product of:
        0.5654825 = queryWeight, product of:
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.08164394 = queryNorm
        3.4631014 = fieldWeight in 2946, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.926203 = idf(docFreq=117, maxDocs=44218)
          0.5 = fieldNorm(doc=2946)
    3.4494293 = weight(author_txt:kousha in 2946) [ClassicSimilarity], result of:
      3.4494293 = score(doc=2946,freq=1.0), product of:
        0.8247603 = queryWeight, product of:
          1.2076868 = boost
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.08164394 = queryNorm
        4.1823416 = fieldWeight in 2946, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.364683 = idf(docFreq=27, maxDocs=44218)
          0.5 = fieldNorm(doc=2946)

Similar documents (content)

  1. Kousha, K.; Thelwall, M.: ¬An automatic method for assessing the teaching impact of books from online academic syllabi (2016) 0.64 
    0.642835 = sum of:
  0.642835 = product of:
    1.1479197 = sum of:
      0.030602263 = weight(abstract_txt:social in 3226) [ClassicSimilarity], result of:
        0.030602263 = score(doc=3226,freq=2.0), product of:
          0.082090795 = queryWeight, product of:
            1.0396638 = boost
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.018721363 = queryNorm
          0.37278557 = fieldWeight in 3226, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.027852677 = weight(abstract_txt:impact in 3226) [ClassicSimilarity], result of:
        0.027852677 = score(doc=3226,freq=1.0), product of:
          0.09713596 = queryWeight, product of:
            1.13093 = boost
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.018721363 = queryNorm
          0.28673908 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.048431136 = weight(abstract_txt:automatically in 3226) [ClassicSimilarity], result of:
        0.048431136 = score(doc=3226,freq=1.0), product of:
          0.14045973 = queryWeight, product of:
            1.3599458 = boost
            5.5168705 = idf(docFreq=482, maxDocs=44218)
            0.018721363 = queryNorm
          0.3448044 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.5168705 = idf(docFreq=482, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.06068039 = weight(abstract_txt:humanities in 3226) [ClassicSimilarity], result of:
        0.06068039 = score(doc=3226,freq=1.0), product of:
          0.1632429 = queryWeight, product of:
            1.4660975 = boost
            5.947494 = idf(docFreq=313, maxDocs=44218)
            0.018721363 = queryNorm
          0.37171838 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.947494 = idf(docFreq=313, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.060778078 = weight(abstract_txt:manual in 3226) [ClassicSimilarity], result of:
        0.060778078 = score(doc=3226,freq=1.0), product of:
          0.16341805 = queryWeight, product of:
            1.4668838 = boost
            5.950684 = idf(docFreq=312, maxDocs=44218)
            0.018721363 = queryNorm
          0.37191775 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.950684 = idf(docFreq=312, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.08520325 = weight(abstract_txt:counts in 3226) [ClassicSimilarity], result of:
        0.08520325 = score(doc=3226,freq=1.0), product of:
          0.20469451 = queryWeight, product of:
            1.6417189 = boost
            6.6599345 = idf(docFreq=153, maxDocs=44218)
            0.018721363 = queryNorm
          0.4162459 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.6599345 = idf(docFreq=153, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.024362426 = weight(abstract_txt:results in 3226) [ClassicSimilarity], result of:
        0.024362426 = score(doc=3226,freq=1.0), product of:
          0.111933246 = queryWeight, product of:
            1.7168812 = boost
            3.482422 = idf(docFreq=3693, maxDocs=44218)
            0.018721363 = queryNorm
          0.21765138 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.482422 = idf(docFreq=3693, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.12758513 = weight(abstract_txt:matches in 3226) [ClassicSimilarity], result of:
        0.12758513 = score(doc=3226,freq=1.0), product of:
          0.26791814 = queryWeight, product of:
            1.8782212 = boost
            7.61935 = idf(docFreq=58, maxDocs=44218)
            0.018721363 = queryNorm
          0.47620937 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.61935 = idf(docFreq=58, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.08827726 = weight(abstract_txt:sciences in 3226) [ClassicSimilarity], result of:
        0.08827726 = score(doc=3226,freq=2.0), product of:
          0.19042403 = queryWeight, product of:
            1.939332 = boost
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.018721363 = queryNorm
          0.46358258 = fieldWeight in 3226, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.018269485 = weight(abstract_txt:from in 3226) [ClassicSimilarity], result of:
        0.018269485 = score(doc=3226,freq=1.0), product of:
          0.10576128 = queryWeight, product of:
            2.0439472 = boost
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.018721363 = queryNorm
          0.17274266 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.091106504 = weight(abstract_txt:method in 3226) [ClassicSimilarity], result of:
        0.091106504 = score(doc=3226,freq=3.0), product of:
          0.18698406 = queryWeight, product of:
            2.219029 = boost
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.018721363 = queryNorm
          0.4872421 = fieldWeight in 3226, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.22953334 = weight(abstract_txt:books in 3226) [ClassicSimilarity], result of:
        0.22953334 = score(doc=3226,freq=5.0), product of:
          0.31454968 = queryWeight, product of:
            3.2178094 = boost
            5.2214546 = idf(docFreq=648, maxDocs=44218)
            0.018721363 = queryNorm
          0.7297205 = fieldWeight in 3226, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            5.2214546 = idf(docFreq=648, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.1015974 = weight(abstract_txt:citation in 3226) [ClassicSimilarity], result of:
        0.1015974 = score(doc=3226,freq=1.0), product of:
          0.33196902 = queryWeight, product of:
            3.6212215 = boost
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.018721363 = queryNorm
          0.30604482 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
      0.15364027 = weight(abstract_txt:citations in 3226) [ClassicSimilarity], result of:
        0.15364027 = score(doc=3226,freq=1.0), product of:
          0.46042773 = queryWeight, product of:
            4.606387 = boost
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.018721363 = queryNorm
          0.33369032 = fieldWeight in 3226, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.0625 = fieldNorm(doc=3226)
    0.56 = coord(14/25)
  2. Kousha, K.; Thelwall, M.; Rezaie, S.: Assessing the citation impact of books : the role of Google Books, Google Scholar, and Scopus (2011) 0.57 
    0.5700417 = sum of:
  0.5700417 = product of:
    1.2955494 = sum of:
      0.02163907 = weight(abstract_txt:social in 4920) [ClassicSimilarity], result of:
        0.02163907 = score(doc=4920,freq=1.0), product of:
          0.082090795 = queryWeight, product of:
            1.0396638 = boost
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.018721363 = queryNorm
          0.26359922 = fieldWeight in 4920, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.027852677 = weight(abstract_txt:impact in 4920) [ClassicSimilarity], result of:
        0.027852677 = score(doc=4920,freq=1.0), product of:
          0.09713596 = queryWeight, product of:
            1.13093 = boost
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.018721363 = queryNorm
          0.28673908 = fieldWeight in 4920, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.039366882 = weight(abstract_txt:journal in 4920) [ClassicSimilarity], result of:
        0.039366882 = score(doc=4920,freq=1.0), product of:
          0.122336514 = queryWeight, product of:
            1.2691815 = boost
            5.1486683 = idf(docFreq=697, maxDocs=44218)
            0.018721363 = queryNorm
          0.32179177 = fieldWeight in 4920, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.1486683 = idf(docFreq=697, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.10934278 = weight(abstract_txt:google in 4920) [ClassicSimilarity], result of:
        0.10934278 = score(doc=4920,freq=6.0), product of:
          0.13302861 = queryWeight, product of:
            1.3234825 = boost
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.018721363 = queryNorm
          0.82194936 = fieldWeight in 4920, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.06068039 = weight(abstract_txt:humanities in 4920) [ClassicSimilarity], result of:
        0.06068039 = score(doc=4920,freq=1.0), product of:
          0.1632429 = queryWeight, product of:
            1.4660975 = boost
            5.947494 = idf(docFreq=313, maxDocs=44218)
            0.018721363 = queryNorm
          0.37171838 = fieldWeight in 4920, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.947494 = idf(docFreq=313, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.08520325 = weight(abstract_txt:counts in 4920) [ClassicSimilarity], result of:
        0.08520325 = score(doc=4920,freq=1.0), product of:
          0.20469451 = queryWeight, product of:
            1.6417189 = boost
            6.6599345 = idf(docFreq=153, maxDocs=44218)
            0.018721363 = queryNorm
          0.4162459 = fieldWeight in 4920, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.6599345 = idf(docFreq=153, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.062421452 = weight(abstract_txt:sciences in 4920) [ClassicSimilarity], result of:
        0.062421452 = score(doc=4920,freq=1.0), product of:
          0.19042403 = queryWeight, product of:
            1.939332 = boost
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.018721363 = queryNorm
          0.3278024 = fieldWeight in 4920, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.025836954 = weight(abstract_txt:from in 4920) [ClassicSimilarity], result of:
        0.025836954 = score(doc=4920,freq=2.0), product of:
          0.10576128 = queryWeight, product of:
            2.0439472 = boost
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.018721363 = queryNorm
          0.24429502 = fieldWeight in 4920, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.22953334 = weight(abstract_txt:books in 4920) [ClassicSimilarity], result of:
        0.22953334 = score(doc=4920,freq=5.0), product of:
          0.31454968 = queryWeight, product of:
            3.2178094 = boost
            5.2214546 = idf(docFreq=648, maxDocs=44218)
            0.018721363 = queryNorm
          0.7297205 = fieldWeight in 4920, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            5.2214546 = idf(docFreq=648, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.2271787 = weight(abstract_txt:citation in 4920) [ClassicSimilarity], result of:
        0.2271787 = score(doc=4920,freq=5.0), product of:
          0.33196902 = queryWeight, product of:
            3.6212215 = boost
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.018721363 = queryNorm
          0.684337 = fieldWeight in 4920, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
      0.40649393 = weight(abstract_txt:citations in 4920) [ClassicSimilarity], result of:
        0.40649393 = score(doc=4920,freq=7.0), product of:
          0.46042773 = queryWeight, product of:
            4.606387 = boost
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.018721363 = queryNorm
          0.88286155 = fieldWeight in 4920, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.0625 = fieldNorm(doc=4920)
    0.44 = coord(11/25)
  3. Kousha, K.; Thelwall, M.: Patent citation analysis with Google (2017) 0.55 
    0.5458337 = sum of:
  0.5458337 = product of:
    1.1371536 = sum of:
      0.027852677 = weight(abstract_txt:impact in 3317) [ClassicSimilarity], result of:
        0.027852677 = score(doc=3317,freq=1.0), product of:
          0.09713596 = queryWeight, product of:
            1.13093 = boost
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.018721363 = queryNorm
          0.28673908 = fieldWeight in 3317, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.030891506 = weight(abstract_txt:index in 3317) [ClassicSimilarity], result of:
        0.030891506 = score(doc=3317,freq=1.0), product of:
          0.104078606 = queryWeight, product of:
            1.1706482 = boost
            4.74895 = idf(docFreq=1040, maxDocs=44218)
            0.018721363 = queryNorm
          0.29680938 = fieldWeight in 3317, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.74895 = idf(docFreq=1040, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.054635916 = weight(abstract_txt:articles in 3317) [ClassicSimilarity], result of:
        0.054635916 = score(doc=3317,freq=3.0), product of:
          0.1055392 = queryWeight, product of:
            1.1788338 = boost
            4.7821565 = idf(docFreq=1006, maxDocs=44218)
            0.018721363 = queryNorm
          0.5176836 = fieldWeight in 3317, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.7821565 = idf(docFreq=1006, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.089278005 = weight(abstract_txt:google in 3317) [ClassicSimilarity], result of:
        0.089278005 = score(doc=3317,freq=4.0), product of:
          0.13302861 = queryWeight, product of:
            1.3234825 = boost
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.018721363 = queryNorm
          0.6711188 = fieldWeight in 3317, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.048431136 = weight(abstract_txt:automatically in 3317) [ClassicSimilarity], result of:
        0.048431136 = score(doc=3317,freq=1.0), product of:
          0.14045973 = queryWeight, product of:
            1.3599458 = boost
            5.5168705 = idf(docFreq=482, maxDocs=44218)
            0.018721363 = queryNorm
          0.3448044 = fieldWeight in 3317, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.5168705 = idf(docFreq=482, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.060778078 = weight(abstract_txt:manual in 3317) [ClassicSimilarity], result of:
        0.060778078 = score(doc=3317,freq=1.0), product of:
          0.16341805 = queryWeight, product of:
            1.4668838 = boost
            5.950684 = idf(docFreq=312, maxDocs=44218)
            0.018721363 = queryNorm
          0.37191775 = fieldWeight in 3317, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.950684 = idf(docFreq=312, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.08520325 = weight(abstract_txt:counts in 3317) [ClassicSimilarity], result of:
        0.08520325 = score(doc=3317,freq=1.0), product of:
          0.20469451 = queryWeight, product of:
            1.6417189 = boost
            6.6599345 = idf(docFreq=153, maxDocs=44218)
            0.018721363 = queryNorm
          0.4162459 = fieldWeight in 3317, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.6599345 = idf(docFreq=153, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.024362426 = weight(abstract_txt:results in 3317) [ClassicSimilarity], result of:
        0.024362426 = score(doc=3317,freq=1.0), product of:
          0.111933246 = queryWeight, product of:
            1.7168812 = boost
            3.482422 = idf(docFreq=3693, maxDocs=44218)
            0.018721363 = queryNorm
          0.21765138 = fieldWeight in 3317, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.482422 = idf(docFreq=3693, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.031643678 = weight(abstract_txt:from in 3317) [ClassicSimilarity], result of:
        0.031643678 = score(doc=3317,freq=3.0), product of:
          0.10576128 = queryWeight, product of:
            2.0439472 = boost
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.018721363 = queryNorm
          0.29919907 = fieldWeight in 3317, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.07438815 = weight(abstract_txt:method in 3317) [ClassicSimilarity], result of:
        0.07438815 = score(doc=3317,freq=2.0), product of:
          0.18698406 = queryWeight, product of:
            2.219029 = boost
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.018721363 = queryNorm
          0.3978315 = fieldWeight in 3317, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.2031948 = weight(abstract_txt:citation in 3317) [ClassicSimilarity], result of:
        0.2031948 = score(doc=3317,freq=4.0), product of:
          0.33196902 = queryWeight, product of:
            3.6212215 = boost
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.018721363 = queryNorm
          0.61208963 = fieldWeight in 3317, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
      0.40649393 = weight(abstract_txt:citations in 3317) [ClassicSimilarity], result of:
        0.40649393 = score(doc=3317,freq=7.0), product of:
          0.46042773 = queryWeight, product of:
            4.606387 = boost
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.018721363 = queryNorm
          0.88286155 = fieldWeight in 3317, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.0625 = fieldNorm(doc=3317)
    0.48 = coord(12/25)
  4. Kousha, K.; Thelwall, M.: Google book search : citation analysis for social science and the humanities (2009) 0.55 
    0.54509485 = sum of:
  0.54509485 = product of:
    1.362737 = sum of:
      0.048386432 = weight(abstract_txt:social in 2946) [ClassicSimilarity], result of:
        0.048386432 = score(doc=2946,freq=5.0), product of:
          0.082090795 = queryWeight, product of:
            1.0396638 = boost
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.018721363 = queryNorm
          0.5894258 = fieldWeight in 2946, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.06308812 = weight(abstract_txt:articles in 2946) [ClassicSimilarity], result of:
        0.06308812 = score(doc=2946,freq=4.0), product of:
          0.1055392 = queryWeight, product of:
            1.1788338 = boost
            4.7821565 = idf(docFreq=1006, maxDocs=44218)
            0.018721363 = queryNorm
          0.59776956 = fieldWeight in 2946, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.7821565 = idf(docFreq=1006, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.05567318 = weight(abstract_txt:journal in 2946) [ClassicSimilarity], result of:
        0.05567318 = score(doc=2946,freq=2.0), product of:
          0.122336514 = queryWeight, product of:
            1.2691815 = boost
            5.1486683 = idf(docFreq=697, maxDocs=44218)
            0.018721363 = queryNorm
          0.45508227 = fieldWeight in 2946, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.1486683 = idf(docFreq=697, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.044639003 = weight(abstract_txt:google in 2946) [ClassicSimilarity], result of:
        0.044639003 = score(doc=2946,freq=1.0), product of:
          0.13302861 = queryWeight, product of:
            1.3234825 = boost
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.018721363 = queryNorm
          0.3355594 = fieldWeight in 2946, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.13568547 = weight(abstract_txt:humanities in 2946) [ClassicSimilarity], result of:
        0.13568547 = score(doc=2946,freq=5.0), product of:
          0.1632429 = queryWeight, product of:
            1.4660975 = boost
            5.947494 = idf(docFreq=313, maxDocs=44218)
            0.018721363 = queryNorm
          0.83118755 = fieldWeight in 2946, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            5.947494 = idf(docFreq=313, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.13957861 = weight(abstract_txt:sciences in 2946) [ClassicSimilarity], result of:
        0.13957861 = score(doc=2946,freq=5.0), product of:
          0.19042403 = queryWeight, product of:
            1.939332 = boost
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.018721363 = queryNorm
          0.7329884 = fieldWeight in 2946, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.040851813 = weight(abstract_txt:from in 2946) [ClassicSimilarity], result of:
        0.040851813 = score(doc=2946,freq=5.0), product of:
          0.10576128 = queryWeight, product of:
            2.0439472 = boost
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.018721363 = queryNorm
          0.38626435 = fieldWeight in 2946, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.20530087 = weight(abstract_txt:books in 2946) [ClassicSimilarity], result of:
        0.20530087 = score(doc=2946,freq=4.0), product of:
          0.31454968 = queryWeight, product of:
            3.2178094 = boost
            5.2214546 = idf(docFreq=648, maxDocs=44218)
            0.018721363 = queryNorm
          0.6526818 = fieldWeight in 2946, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            5.2214546 = idf(docFreq=648, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.14368041 = weight(abstract_txt:citation in 2946) [ClassicSimilarity], result of:
        0.14368041 = score(doc=2946,freq=2.0), product of:
          0.33196902 = queryWeight, product of:
            3.6212215 = boost
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.018721363 = queryNorm
          0.43281272 = fieldWeight in 2946, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
      0.48585322 = weight(abstract_txt:citations in 2946) [ClassicSimilarity], result of:
        0.48585322 = score(doc=2946,freq=10.0), product of:
          0.46042773 = queryWeight, product of:
            4.606387 = boost
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.018721363 = queryNorm
          1.0552214 = fieldWeight in 2946, product of:
            3.1622777 = tf(freq=10.0), with freq of:
              10.0 = termFreq=10.0
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.0625 = fieldNorm(doc=2946)
    0.4 = coord(10/25)
  5. Kousha, K.; Thelwall, M.: Google Scholar citations and Google Web/URL citations : a multi-discipline exploratory analysis (2007) 0.43 
    0.43471345 = sum of:
  0.43471345 = product of:
    1.0867836 = sum of:
      0.030602263 = weight(abstract_txt:social in 337) [ClassicSimilarity], result of:
        0.030602263 = score(doc=337,freq=2.0), product of:
          0.082090795 = queryWeight, product of:
            1.0396638 = boost
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.018721363 = queryNorm
          0.37278557 = fieldWeight in 337, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.2175875 = idf(docFreq=1770, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.027852677 = weight(abstract_txt:impact in 337) [ClassicSimilarity], result of:
        0.027852677 = score(doc=337,freq=1.0), product of:
          0.09713596 = queryWeight, product of:
            1.13093 = boost
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.018721363 = queryNorm
          0.28673908 = fieldWeight in 337, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.5878253 = idf(docFreq=1222, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.04461004 = weight(abstract_txt:articles in 337) [ClassicSimilarity], result of:
        0.04461004 = score(doc=337,freq=2.0), product of:
          0.1055392 = queryWeight, product of:
            1.1788338 = boost
            4.7821565 = idf(docFreq=1006, maxDocs=44218)
            0.018721363 = queryNorm
          0.4226869 = fieldWeight in 337, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.7821565 = idf(docFreq=1006, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.039366882 = weight(abstract_txt:journal in 337) [ClassicSimilarity], result of:
        0.039366882 = score(doc=337,freq=1.0), product of:
          0.122336514 = queryWeight, product of:
            1.2691815 = boost
            5.1486683 = idf(docFreq=697, maxDocs=44218)
            0.018721363 = queryNorm
          0.32179177 = fieldWeight in 337, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.1486683 = idf(docFreq=697, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.133917 = weight(abstract_txt:google in 337) [ClassicSimilarity], result of:
        0.133917 = score(doc=337,freq=9.0), product of:
          0.13302861 = queryWeight, product of:
            1.3234825 = boost
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.018721363 = queryNorm
          1.0066782 = fieldWeight in 337, product of:
            3.0 = tf(freq=9.0), with freq of:
              9.0 = termFreq=9.0
            5.3689504 = idf(docFreq=559, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.062421452 = weight(abstract_txt:sciences in 337) [ClassicSimilarity], result of:
        0.062421452 = score(doc=337,freq=1.0), product of:
          0.19042403 = queryWeight, product of:
            1.939332 = boost
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.018721363 = queryNorm
          0.3278024 = fieldWeight in 337, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.244838 = idf(docFreq=633, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.018269485 = weight(abstract_txt:from in 337) [ClassicSimilarity], result of:
        0.018269485 = score(doc=337,freq=1.0), product of:
          0.10576128 = queryWeight, product of:
            2.0439472 = boost
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.018721363 = queryNorm
          0.17274266 = fieldWeight in 337, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            2.7638826 = idf(docFreq=7577, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.07438815 = weight(abstract_txt:method in 337) [ClassicSimilarity], result of:
        0.07438815 = score(doc=337,freq=2.0), product of:
          0.18698406 = queryWeight, product of:
            2.219029 = boost
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.018721363 = queryNorm
          0.3978315 = fieldWeight in 337, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.2488618 = weight(abstract_txt:citation in 337) [ClassicSimilarity], result of:
        0.2488618 = score(doc=337,freq=6.0), product of:
          0.33196902 = queryWeight, product of:
            3.6212215 = boost
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.018721363 = queryNorm
          0.7496537 = fieldWeight in 337, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            4.896717 = idf(docFreq=897, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
      0.40649393 = weight(abstract_txt:citations in 337) [ClassicSimilarity], result of:
        0.40649393 = score(doc=337,freq=7.0), product of:
          0.46042773 = queryWeight, product of:
            4.606387 = boost
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.018721363 = queryNorm
          0.88286155 = fieldWeight in 337, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            5.339045 = idf(docFreq=576, maxDocs=44218)
            0.0625 = fieldNorm(doc=337)
    0.4 = coord(10/25)