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Mukherjee, B.: Do open-access journals in library and information science have any scholarly impact? : a bibliometric study of selected open-access journals using Google Scholar (2009)
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Nederhof, A.J.; Visser, M.S.: Quantitative deconstruction of citation impact indicators : waxing field impact but waning journal impact (2004)
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Frandsen, T.F.; Rousseau, R.; Rowlands, I.: Diffusion factors (2006)
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