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Nakkouzi, Z.S.; Eastman, C.M.: Query formulation for handling negation in information retrieval systems (1990)
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Klein, S.T.: On the use of negation in Boolean IR queries. (2009)
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Drabenstott, K.M.; Weller, M.S.: Handling spelling errors in online catalog searches (1996)
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Steichen, B.; Lowe, R.: How do multilingual users search? : An investigation of query and result list language choices (2021)
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Lex, W.: ¬A representation of concepts for their computerization (1987)
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