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Tahani, V.: ¬A general conceptual framework for information retrieval systems (1972)
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Dominich, S.; Kiezer, T.: ¬A measure theoretic approach to information retrieval (2007)
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Quast, D.: Rationaliy, neural sets and deterministic chaos : knowledge organisation for the human mind; the user of libraries and information centres (1996)
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Fuzziness in database management systems (1995)
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Wong, S.K.M.: On modelling information retrieval with probabilistic inference (1995)
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