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Maron, M.E.; Kuhns, I.L.: On relevance, probabilistic indexing and information retrieval (1960)
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Bache, R.; Baillie, M.; Crestani, F.: Measuring the likelihood property of scoring functions in general retrieval models (2009)
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Bruza, P.D.; Huibers, T.W.C.: ¬A study of aboutness in information retrieval (1996)
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Theory of subject analysis : A sourcebook (1985)
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