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Belkin, N.J.; Croft, W.B.: Retrieval techniques (1987) 0.01

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Source: Annual review of information science and technology. 22(1987), S.109-145

Belkin, N.J.; Croft, W.B.: Information filtering and information retrieval : two sides of the same coin? (1992) 0.01

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Source: Communications of the Association for Computing Machinery. 35(1992) no.12, S.29-38

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