S. Tongchim, and P. Chongstitvatana. Proceedings of Asian Computing Science Conference, volume 1742 of LNCS, page 388--389. Phuket, Thailand, Springer-Verlag, (10-12 December 1999)
S. Tongchim, and P. Chongstitvatana. Proceedings of the Sixth International Conference on
Control, Automation, Robotics and Vision, Singapore, (December 2000)
T. Sukkarnjanonth, and P. Chongstitvatana. Proc. of 4th National Computer Science and Engineering
Conference (NCSEC 2000), page 81--85. Queen Sirikit National Convention Center, Bangkok,
Thailand, (16-17 November 2000)
W. Suwannik, and P. Chongstitvatana. The Second Asian Symposium Industrial Automation and
Robotics, page IA030/01. Bangkok International Trade and Exhibition Center,
(BITEC), Banglok, Thailand, (17-18 May 2001)