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Xu, Y.; Yin, H.: Novelty and topicality in interactive information retrieval (2008)
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Xu, Y.; Wang, D.: Order effect in relevance judgment : mediation and causality (2008)
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Borlund, P.: ¬The concept of relevance in IR (2003)
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Xu, Y.: Relevance judgment in epistemic and hedonic information searches (2007)
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