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Hearst, M.; Pedersen, J.; Pirolli, P.; Schütze, H.; Grefenstette, G.; Hull, D.: Xerox site report : four TREC-4 tracks (1996)
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Hull, D.; Ait-Mokhtar, S.; Chuat, M.; Eisele, A.; Gaussier, E.; Grefenstette, G.; Isabelle, P.; Samulesson, C.; Segand, F.: Language technologies and patent search and classification (2001)
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Grefenstette, G.: Explorations in automatic thesaurus discovery (1994)
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