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Robertson, S.E.: On relevance weight estimation and query expansion (1986)
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Robertson, S.E.: On term selection for query expansion (1990)
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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.: OKAPI at TREC-3 (1995)
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Vechtomova, O.; Robertson, S.E.: ¬A domain-independent approach to finding related entities (2012)
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