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Smolinsky, L.J.: Discrete power law with exponential cutoff and Lotka's law (2017)
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Brindley, L.: Information and innovation (1992)
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Abramo, G.; D'Angelo, C.A.; Di Costa, F.: Testing the trade-off between productivity and quality in research activities (2009)
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McCain, C.; Shorten, J.: Cataloging efficiency and effectiveness (2002)
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Bookstein, A.; Moed, H.; Yitzahki, M.: Measures of international collaboration in scientific literature : part I (2006)
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