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Robertson, S.E.; Walker, S.; Beaulieu, M.M.; Gatford, M.; Payne, A.: Okapi at TREC-4 (1996)
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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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Robertson, S.E.; Hancock-Beaulieu, M.M.: On the evaluation of IR systems (1992)
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- Information processing and management. 28(1992) no.4, S.457-466
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Robertson, S.E.: OKAPI at TREC (1994)
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Robertson, S.E.: OKAPI at TREC-1 (1994)
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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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Robertson, S.E.; Walker, S.; Hancock-Beaulieu, M.M.: Large test collection experiments of an operational, interactive system : OKAPI at TREC (1995)
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Robertson, S.E.: On term selection for query expansion (1990)
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Robertson, S.E.: Query-document symmetry and dual models (1994)
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Robertson, S.E.; Beaulieu, M.: Research and evaluation in information retrieval (1997)
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MacFarlane, A.; Robertson, S.E.; McCann, J.A.: Parallel computing in information retrieval : an updated review (1997)
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Robertson, S.E.: Overview of the Okapi projects (1997)
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Robertson, S.E.: OKAPI at TREC-3 (1995)
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Huang, X.; Robertson, S.E.: Application of probilistic methods to Chinese text retrieval (1997)
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- Journal of documentation. 53(1997) no.1, S.74-79
