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Computer Science and Mathematical Modelling > 2017 > No. 5 > 41--51
Lecture Notes in Computer Science > String Processing and Information Retrieval > Crowdsourcing and Recommendation > 1-12
Operations Research Letters > 2013 > 41 > 6 > 664-669
Machine Learning > 2009 > 75 > 1 > 37-67
Computational and Mathematical Organization Theory > 2005 > 11 > 2 > 141-159