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Poo, D.C.C.; Khoo, C.S.G.: Online Catalog Subject Searching (2009)
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Fang, L.: ¬A developing search service : heterogeneous resources integration and retrieval system (2004)
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Stuckenschmidt, H.; Harmelen, F van; Waard, A. de; Scerri, T.; Bhogal, R.; Buel, J. van; Crowlesmith, I.; Fluit, C.; Kampman, A.; Broekstra, J.; Mulligen, E. van: Exploring large document repositories with RDF technology : the DOPE project (2004)
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Park, S.: Usability, user preferences, effectiveness, and user behaviors when searching individual and integrated full-text databases : implications for digital libraries (2000)
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Smith, D.A.: Exploratory and faceted browsing over heterogeneous and cross-domain data sources. (2011)
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