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  1. Xu, Y.; Liu, C.: ¬The dynamics of interactive information retrieval : part II: an empirical study from the activity theory perspective (2007) 10.09 
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  2. Liu, J.; Liu, C.; Belkin, N.J.: Predicting information searchers' topic knowledge at different search stages (2016) 10.09 
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  3. Liu, J.; Liu, C.: Personalization in text information retrieval : a survey (2020) 10.09 
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