J. Allan, V. Lavrenko, and H. Jin. CIKM '00: Proceedings of the ninth international conference on Information and knowledge management, page 374--381. New York, NY, USA, ACM, (2000)
J. Allan, R. Papka, and V. Lavrenko. SIGIR '98: Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval, page 37--45. New York, NY, USA, ACM, (1998)