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Walker, S.: Improving subject access painlessly : recent work on the Okapi online catalogue projects (1988)
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Walker, S.: Ease of use in online catalogues : a plea for the user (1986)
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Walker, S.: ¬The Okapi online catalogue research projects (1989)
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Jones, S.; Gatford, M.; Robertson, S.; Hancock-Beaulieu, M.; Secker, J.; Walker, S.: Interactive thesaurus navigation : intelligence rules OK? (1995)
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Ogden, J.; Summers, E.; Walker, S.: Know(ing) Infrastructure : the wayback machine as object and instrument of digital research (2023)
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Walker, S.: Okapi : Evaluating and enhancing an experimental online catalog (1987)
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Walker, S.: ¬The free language approach to online catalogues (1985)
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Walker, S.; Hancock-Beaulieu, M.: OKAPI at city : an evaluation facility for interactive IR (1991)
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Walker, S.: OCLC WorldCat collection sets (1998)
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Walker, S.; Jones, R.M.: Improving subject retrieval in online catalogues : T.1: Stemming, automatic spelling correction and cross-reference tables (1987)
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Robertson, S.; Walker, S.: Threshold setting in adaptive filtering (2000)
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Mitev, N.N.; Walker, S.: Information retrieval aids in an online public access catalogue : automatic intelligent search sequencing (1985)
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Sparck Jones, K.; Walker, S.; Robertson, S.E.: ¬A probabilistic model of information retrieval : development and comparative experiments - part 1 (2000)
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Sparck Jones, K.; Walker, S.; Robertson, S.E.: ¬A probabilistic model of information retrieval : development and comparative experiments - part 2 (2000)
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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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Mitev, N.N.; Venner, G.M.; Walker, S.: Designing an online public access catalogue : OKAPI, a catalogue on a local area network (1985)
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