Search (3 results, page 1 of 1)

  • × author_ss:"Leydesdorff, L."
  • × year_i:[1990 TO 2000}
  1. Leydesdorff, L.: ¬The generation of aggregated journal-journal citation maps on the basis of the CD-ROM version of the Science Citation Index (1994) 0.01
    0.005333513 = product of:
      0.026667565 = sum of:
        0.026667565 = product of:
          0.05333513 = sum of:
            0.05333513 = weight(_text_:l in 8281) [ClassicSimilarity], result of:
              0.05333513 = score(doc=8281,freq=2.0), product of:
                0.17350465 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.043652784 = queryNorm
                0.30739886 = fieldWeight in 8281, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=8281)
          0.5 = coord(1/2)
      0.2 = coord(1/5)
    
  2. Leydesdorff, L.: Theories of citation? (1999) 0.01
    0.005333513 = product of:
      0.026667565 = sum of:
        0.026667565 = product of:
          0.05333513 = sum of:
            0.05333513 = weight(_text_:l in 5130) [ClassicSimilarity], result of:
              0.05333513 = score(doc=5130,freq=2.0), product of:
                0.17350465 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.043652784 = queryNorm
                0.30739886 = fieldWeight in 5130, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=5130)
          0.5 = coord(1/2)
      0.2 = coord(1/5)
    
  3. Leydesdorff, L.: Why words and co-word cannot map the development of the science (1997) 0.00
    0.0045715827 = product of:
      0.022857912 = sum of:
        0.022857912 = product of:
          0.045715824 = sum of:
            0.045715824 = weight(_text_:l in 147) [ClassicSimilarity], result of:
              0.045715824 = score(doc=147,freq=2.0), product of:
                0.17350465 = queryWeight, product of:
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.043652784 = queryNorm
                0.26348472 = fieldWeight in 147, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.9746525 = idf(docFreq=2257, maxDocs=44218)
                  0.046875 = fieldNorm(doc=147)
          0.5 = coord(1/2)
      0.2 = coord(1/5)