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Calculating the h-index : Web of Science, Scopus or Google Scholar? (2011)
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Garfield, E.: Citation indexes for science (1985)
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Leydesdorff, L.: How are new citation-based journal indicators adding to the bibliometric toolbox? (2009)
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Das, A.K.; Mishra, S.: S R Ranganathan in Google Scholar and other citation databases (2015)
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McVeigh, M.E.: Citation indexes and the Web of Science (2009)
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