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Chen, P.S.: On inference rules of logic-based information retrieval systems (1994)
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Moore, M.J.: Update '92. (1992)
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Pritchard-Schoch, T.: Natural language comes of age (1993)
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Preston, C.M.; Lynch, C.A.: Report of the first international conference on information and knowledge management (1993)
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Paskin, N.: DOI: current status and outlook (1999)
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