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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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Külper, U.; Will, G.: ¬Das Projekt Bücherschatz : interdisziplinäre und partizipative Entwicklung eines kindgerechten Bibliotheks-Online-Kataloges (1996)
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Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬A graphical interface for OKAPI : the design and evaluation of an online catalogue system with direct manipulation interaction for subject access (1994)
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Beaulieu, M.; Payne, A.; Do, T.; Jones, S.: ENQUIRE Okapi project (1996)
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