Rafols, I.; Porter, A.L.; Leydesdorff, L.: Science overlay maps : a new tool for research policy and library management (2010)
0.02
0.017195461 = product of:
0.0859773 = sum of:
0.0859773 = weight(_text_:policy in 3987) [ClassicSimilarity], result of:
0.0859773 = score(doc=3987,freq=2.0), product of:
0.24188796 = queryWeight, product of:
5.361833 = idf(docFreq=563, maxDocs=44218)
0.045112923 = queryNorm
0.35544267 = fieldWeight in 3987, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.361833 = idf(docFreq=563, maxDocs=44218)
0.046875 = fieldNorm(doc=3987)
0.2 = coord(1/5)
