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Kekäläinen, J.: Binary and graded relevance in IR evaluations : comparison of the effects on ranking of IR systems (2005)
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- Information processing and management. 41(2005) no.5, S.1019-1034
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Sormunen, E.; Kekäläinen, J.; Koivisto, J.; Järvelin, K.: Document text characteristics affect the ranking of the most relevant documents by expanded structured queries (2001)
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- Journal of documentation. 57(2001) no.3, S.358-376