K. Xu, Y. Feng, S. Huang, and D. Zhao. Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing EMNLP, page 536–540. (2015)cite arxiv:1506.07650.
J. Hopcroft, T. Lou, and J. Tang. Proceedings of the 20th ACM International Conference on Information and Knowledge Management, page 1137--1146. New York, NY, USA, ACM, (2011)
C. Wang, J. Han, Y. Jia, J. Tang, D. Zhang, Y. Yu, and J. Guo. Proceedings of the 16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 203--212. New York, NY, USA, ACM, (2010)