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Hildreth, C.R.: Are Web-based OPACs more effective retrieval systems than their conventional predecessors? : an experimental study (2000)
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Bowman, S.; Avey, F.D.; Turner, C.: ¬A comparative study of the impact of Online Public Access Catalogues on the information gathering and utilisation habits of different user groups (1991)
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Ashton, J.: Development of the British Library's OPAC 97 : the value of a user-centred approach (1998)
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Cherry, J.M.: OPACs in twelve Canadian academic libraries : an evaluation of functional capabilities and interface features (1994)
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Ashton, J.: ONE: the final OPAC frontier (1998)
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