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author_ss:"Kekäläinen, J."
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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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Kekäläinen, J.; Järvelin, K.: Using graded relevance assessments in IR evaluation (2002)
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