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Fugmann, R.: Informationstheorie: Der Jahrhundertbluff : (Teil 1] (2007)
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Klir, G.I.; Wierman, M.J.: Uncertainty-based information : Elements of generalized information theory (1998)
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Tahani, V.: ¬A general conceptual framework for information retrieval systems (1972)
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Hood, W.W.; Wilson, C.S.: Solving problems in library and information science using Fuzzy set theory (2002)
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Dominich, S.: Mathematical foundations of information retrieval (2001)
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