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Teodorescu, I.: Artificial intelligence and information retrieval (1987)
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Samstag-Schnock, U.; Meadow, C.T.: PBS: an ecomical natural language query interpreter (1993)
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Buckland, M.: Prototyping enhanced online search capability (1993)
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Levergood, B.; Farrenkopf, S.; Frasnelli, E.: ¬The specification of the language of the field and interoperability : cross-language access to catalogues and online libraries (CACAO) (2008)
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Harman, D.: User-friendly systems instead of user-friendly front-ends (1992)
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