Y. Yang, H. Liu, J. Carbonell, and W. Ma. Proceedings of the Eighth ACM International Conference on Web Search and Data Mining - WSDM \textquotesingle15, ACM Press, (2015)
I. Labutov, Y. Huang, P. Brusilovsky, and D. He. Proceedings of the 23rd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 907--915. New York, NY, USA, ACM, (2017)