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Järvelin, K.; Niemi, T.: Deductive information retrieval based on classifications (1993) 9.39

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Author: Niemi, T.

Järvelin, K.; Kristensen, J.; Niemi, T.; Sormunen, E.; Keskustalo, H.: ¬A deductive data model for query expansion (1996) 9.39

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Author: Niemi, T.