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Raan, A.F.J. van: ¬The influence of international collaboration on the impact of research results (1998)
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Schneider, K.: Scopus contra ISI-WOS : Versuch einer vergleichenden Bewertung aus pharmakognostischer Sicht (2006)
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Marshakova-Shaikevich, I.: Bibliometric maps of field of science (2005)
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