D. Nguyen, D. Trieschnigg, and M. Theune. Proceedings of the 23rd ACM International Conference on Conference on Information and Knowledge Management, page 321--330. ACM, (2014)
Y. Singer, and M. Mittal. Proceedings of the 22nd international conference on World Wide Web, page 1157--1166. International World Wide Web Conferences Steering Committee, (2013)