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Beaulieu, M.M.; Gatford, M.; Huang, X.; Robertson, S.E.; Walker, S.; Williams, P.: Okapi an TREC-5 (1997)
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Nicholas, D.; Williams, P.: ¬The changing information environment : the impact of the Internet on information seeking behaviour in the media (1999)
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Williams, P.; Nicholas, D.: ¬The migration of news to the web (1999)
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