Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014)
0.00
0.0012234044 = product of:
0.0036702133 = sum of:
0.0036702133 = weight(_text_:s in 1238) [ClassicSimilarity], result of:
0.0036702133 = score(doc=1238,freq=2.0), product of:
0.043647945 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04014573 = queryNorm
0.08408674 = fieldWeight in 1238, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0546875 = fieldNorm(doc=1238)
0.33333334 = coord(1/3)
- Source
- Journal of the Association for Information Science and Technology. 65(2014) no.4, S.751-764
