Hwee Tou Ng Mun-Kew Leong Min-Yen Kan Donghong Ji Information Retrieval Technology, Third Asia Information Retrieval Symposium, AIRS 2006, Singapore, October 16-18, 2006, Proceedings Lecture Notes in Computer Science 4182 Springer 2006 3-540-45780-1 AIRS db/conf/airs/airs2006.html