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Longshu, L.; Xia, Z.: On an aproximate fuzzy information retrieval agent (1998)
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Kraft, D.; Bordogna, G.; Pasi, G.: Fuzzy set theory (2009)
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Tahani, V.: ¬A general conceptual framework for information retrieval systems (1972)
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Fuzziness in database management systems (1995)
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Ramsey, M.C.; Chen, H.; Zhu, B.; Schatz, B.R.: ¬A collection of visual thesauri for browsing large collections of geographic images (1999)
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