Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014)
0.01
0.012754875 = product of:
0.02550975 = sum of:
0.02550975 = product of:
0.0510195 = sum of:
0.0510195 = weight(_text_:w in 1238) [ClassicSimilarity], result of:
0.0510195 = score(doc=1238,freq=2.0), product of:
0.17310768 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.045425482 = queryNorm
0.29472697 = fieldWeight in 1238, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0546875 = fieldNorm(doc=1238)
0.5 = coord(1/2)
0.5 = coord(1/2)