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Walker, S.: Improving subject access painlessly : recent work on the Okapi online catalogue projects (1988)
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- Program. 22(1988), S.21-31
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Walker, S.: Ease of use in online catalogues : a plea for the user (1986)
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- Online public access to library files. Ed.: J. Kinsella
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Walker, S.: ¬The Okapi online catalogue research projects (1989)
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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.; Jones, R.M.: Improving subject retrieval in online catalogues : T.1: Stemming, automatic spelling correction and cross-reference tables (1987)
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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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Robertson, S.E.; Walker, S.; Beaulieu, M.: Experimentation as a way of life : Okapi at TREC (2000)
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Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990)
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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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Walker, S.: Subject access in online catalogues (1991)
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Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
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