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Robertson, M.; Willett, P.: ¬An upperbound to the performance of ranked output searching : optimal weighting of query terms using a genetic algorithms (1996)
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Robertson, S.E.: On term selection for query expansion (1990)
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Robertson, S.E.: OKAPI at TREC-1 (1994)
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Cai, F.; Wang, S.; Rijke, M.de: Behavior-based personalization in web search (2017)
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Efthimiadis, E.N.: Interactive query expansion : a user-based evaluation in a relevance feedback environment (2000)
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