A case for interaction: a study of interactive information retrieval behavior and effectiveness,
Koenemann, J.; rgen,; Belkin, N.J.
, Proceedings of the SIGCHI conference on Human factors in computing systems: common ground, Vancouver, British Columbia, Canada, p.205-212, (1996)
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Retrieval techniques,
Belkin, N.J.; Croft, W.B.
, Annual review of information science and technology, vol. 22, p.109-145, (1987)
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