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Roszkowski, M.; Lukas, C.: ¬A distributed architecture for resource discovery using metadata (1998)
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Moen, W.: Information retrieval protocols : Z39.50 and Search & Retrieve via URL (2009)
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Egghe, L.: Vector retrieval, fuzzy retrieval and the universal fuzzy IR surface for IR evaluation (2004)
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Laverty, C.Y.C.: Library instruction on the Web : inventing options and opportunities (1997)
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Wartik, S.: Boolean operators (1992)
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