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  • × author_ss:"Robertson, A.M."
  • × theme_ss:"Retrievalstudien"
  • × author_ss:"Willett, P."
  • × type_ss:"a"
  1. Ekmekcioglu, F.C.; Robertson, A.M.; Willett, P.: Effectiveness of query expansion in ranked-output document retrieval systems (1992) 1.00
    1.0 = *:*, product of:
      1.0 = boost
      1.0 = queryNorm