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Jones, K.: Linguistic searching versus relevance ranking : DR-LINK and TARGET (1999)
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Brenner, E.H.: Beyond Boolean : new approaches in information retrieval; the quest for intuitive online search systems past, present & future (1995)
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Frakes, W.B.: Stemming algorithms (1992)
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Abu-Salem, H.; Al-Omari, M.; Evens, M.W.: Stemming methodologies over individual query words for an Arabic information retrieval system (1999)
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