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Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987) 1.00
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Robertson, S.E.; Walker, S.; Beaulieu, M.: Laboratory experiments with Okapi : participation in the TREC programme (1997) 1.00
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Robertson, S.E.: ¬The methodology of information retrieval experiment (1981) 1.00
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Robertson, S.E.: ¬The parametric description of retrieval tests : Part I: The basic parameters (1969) 1.00
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Robertson, S.E.: ¬The parametric description of retrieval tests : Part II: Overall measures (1969) 1.00
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Robertson, S.E.; Walker, S.; Beaulieu, M.: Experimentation as a way of life : Okapi at TREC (2000) 1.00
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Robertson, S.E.; Walker, S.; Hancock-Beaulieu, M.M.: Large test collection experiments of an operational, interactive system : OKAPI at TREC (1995) 1.00
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Beaulieu, M.M.; Gatford, M.; Huang, X.; Robertson, S.E.; Walker, S.; Williams, P.: Okapi an TREC-5 (1997) 1.00
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Robertson, S.E.; Sparck Jones, K.: Simple, proven approaches to text retrieval (1997) 1.00
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