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Beaulieu, M.: Approaches to user-based studies in information seeking and retrieval : a Sheffield perspective (2003)
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Robertson, S.E.; Walker, S.; Beaulieu, M.: Laboratory experiments with Okapi : participation in the TREC programme (1997)
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Beaulieu, M.; Robertson, S.; Rasmussen, E.: Evaluating interactive systems in TREC (1996)
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