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  1. Robertson, A.M.; Willett, P.: Retrieval techniques for historical English text : searching the sixteenth and seventeenth century titles in the Catalogue of Caterbury Cathedral Library using spelling-correction methods (1992) 9.62 
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  2. Jones, G.; Robertson, A.M.; Willett, P.: ¬An introduction to genetic algorithms and to their use in information retrieval (1994) 9.62 
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  3. Robertson, A.M.; Willett, P.: Generation of equifrequent groups of words using a genetic algorithm (1994) 9.62 
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  4. Robertson, A.M.; Willett, P.: Identification of word-variants in historical text databases : report for the period October 1990 to September 1992 (1994) 9.62 
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  5. Robertson, A.M.; Willett, P.: Use of genetic algorithms in information retrieval (1995) 9.62 
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  6. Ekmekcioglu, F.C.; Robertson, A.M.; Willett, P.: Effectiveness of query expansion in ranked-output document retrieval systems (1992) 9.62 
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  7. Robertson, A.M.; Willett, P.: Applications of n-grams in textual information systems (1998) 9.62 
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