J. Allan, R. Papka, and V. Lavrenko. Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval, page 37--45. ACM, (1998)
Y. Yang, T. Pierce, and J. Carbonell. Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval, page 28--36. ACM, (1998)
S. Phuvipadawat, and T. Murata. Web Intelligence and Intelligent Agent Technology (WI-IAT), 2010 IEEE/WIC/ACM International Conference on, 3, page 120--123. IEEE, (2010)