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Fuhr, N.: Probabilistic datalog : implementing logical information retrieval for advanced applications (2000)
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Chiaravalloti, M.T.; Pasceri, E.; Taverniti, M.: URT "Indexing and Classification Systems" Projects and biomedical knowledge standards (2012)
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Nie, J.-Y.: Query expansion and query translation as logical inference (2003)
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Suzuki, Y.: Partial information and its information structure (1995)
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Crestani, F.; Rijsbergen, C.J. van: Information retrieval by logical imaging (1995)
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