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Keen, E.M.: Presenting results of experimental retrieval comparisons (1992)
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- Information processing and management. 28(1992) no.4, S.491-502
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Keen, E.M.: Some aspects of proximity searching in text retrieval systems (1992)
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- Journal of information science. 18(1992), S.89-98
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Keen, E.M.; Hartley, R.J.: Phrase processing in text retrieval (1994)
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- Journal of document and text management. 2(1994) no.1, S.23-34
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Keen, E.M.: Aspects of computer-based indexing languages (1991)
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- S.148-151
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Keen, E.M.: Interactive ranked retrieval (1995)
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- 146 S
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Keen, E.M.: Designing and testing an interactive ranked retrieval system for professional searchers (1994)
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- Journal of information science. 20(1994) no.6, S.389-398