H. Chieu, and H. Ng. Proceedings of the Eighteenth National Conference on Artificial Intelligence
(AAAI 2002). Edmonton, Alberta, Canada., page 786--791. (2002)
H. Chieu, and H. Ng. Eighteenth national conference on Artificial intelligence, page 786--791. Menlo Park, CA, USA, American Association for Artificial Intelligence, (2002)