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- author's%3a%22Kieslich%2c S. %28Bearb.%29%22 2
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Costas, R.; Leeuwen, T.N. van; Bordons, M.: ¬A bibliometric classificatory approach for the study and assessment of research performance at the individual level : the effects of age on productivity and impact (2010)
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- Journal of the American Society for Information Science and Technology. 61(2010) no.8, S.1564-1581
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Costas, R.; Leeuwen, T.N. van; Bordons, M.: Referencing patterns of individual researchers : do top scientists rely on more extensive information sources? (2012)
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- Journal of the American Society for Information Science and Technology. 63(2012) no.12, S.2433-2450