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Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001)
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Klein, A.: Von der Schneeflocke zur Lawine : Möglichkeiten der Nutzung freier Zitationsdaten in Bibliotheken (2017)
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Bensman, S.J.: Eugene Garfield, Francis Narin, and PageRank : the theoretical bases of the Google search engine (2013)
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Tay, A.: ¬The next generation discovery citation indexes : a review of the landscape in 2020 (2020)
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