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Ellis, D.: ¬A behavioral approach to information system design (1989)
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- Journal of documentation. 45(1989) no.3, S.171-212
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Ellis, D.: ¬A behavioral model for information retrieval system design (1989)
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- Journal of information science. 15(1989) no.4, S.237-247
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Ellis, D.: Theory and explanation in information retrieval research (1984)
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- Journal of information science. 8(1984), S.25-38
