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Jiang, Z.; Liu, X.; Chen, Y.: Recovering uncaptured citations in a scholarly network : a two-step citation analysis to estimate publication importance (2016)
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Waltman, L.; Calero-Medina, C.; Kosten, J.; Noyons, E.C.M.; Tijssen, R.J.W.; Eck, N.J. van; Leeuwen, T.N. van; Raan, A.F.J. van; Visser, M.S.; Wouters, P.: ¬The Leiden ranking 2011/2012 : data collection, indicators, and interpretation (2012)
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Szava-Kovats, E.: Non-indexed literature citedness (1997)
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Miller, U.: Thesaurus construction : problems and their roots (1997)
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Sandore, B.; Ryan, K.: Evaluating electronic resources : a study using three concurrent methods (1994)
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