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Geyser, E.P.; Brakel, P.A. van: Man-machine interaction as a factor in the design of computerised information retrieval systems (1991)
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Stojanovic, N.: Ontology-based Information Retrieval : methods and tools for cooperative query answering (2005)
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How classifications work : problems and challenges in an electronic age (1998)
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Xie, I.: Information searching and search models (2009)
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