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Robertson, S.E.: On relevance weight estimation and query expansion (1986)
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- Journal of documentation. 42(1986), S.182-188
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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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- Information processing and management. 31(1995) no.3, S.345-360
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Robertson, S.E.: On term selection for query expansion (1990)
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- Journal of documentation. 46(1990) no.4, S.359-364
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Vechtomova, O.; Robertson, S.E.: ¬A domain-independent approach to finding related entities (2012)
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- Information processing and management. 48(2012) no.4, S.654-670