J. Huang, Z. Zhuang, J. Li, and C. Giles. Proceedings of the 2008 International Conference on Web Search and Data Mining, page 107--116. New York, NY, USA, ACM, (2008)
H. Li, F. Xu, and H. Uszkoreit. Proceedings of the International Conference on Recent Advances in Natural Language Processing 2011 (RANLP 2011), page 660-665. RANLP 2011 Organising Committee, (2011)
R. Yan, C. Huang, J. Tang, Y. Zhang, and X. Li. Proceedings of the 12th ACM/IEEE-CS joint conference on Digital Libraries, page 51--60. New York, NY, USA, ACM, (2012)