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Efthimiadis, E.N.: Approaches to search formulation and query expansion in information systems : DRS, DBMS, ES (1992) 1.00
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Efthimiadis, E.N.: Query expansion (1996) 1.00

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Efthimiadis, E.N.: End-users' understanding of thesaural knowledge structures in interactive query expansion (1994) 1.00
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Fidel, R.; Efthimiadis, E.N.: Terminological knowledge structure for intermediary expert systems (1995) 1.00
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Efthimiadis, E.N.: User choices : a new yardstick for the evaluation of ranking algorithms for interactive query expansion (1995) 1.00
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Efthimiadis, E.N.: Interactive query expansion : a user-based evaluation in a relevance feedback environment (2000) 1.00
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