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  • × year_i:[1990 TO 2000}
  1. Järvelin, K.; Niemi, T.: Deductive information retrieval based on classifications (1993) 9.39
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    Author
    Niemi, T.
  2. 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.