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Srinivasan, P.: Query expansion and MEDLINE (1996)
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Efthimiadis, E.N.: Interactive query expansion : a user-based evaluation in a relevance feedback environment (2000)
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Brajnik, G.; Mizzaro, S.; Tasso, C.; Venuti, F.: Strategic help in user interfaces for information retrieval (2002)
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Spink, A.: Towards a theoretical framework for information retrieval in an information seeking context (1999)
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