J. Lin, C. Yang, S. Tseng, and C. Huang. Language, Information, and Computation - Proceedings of the 16th Pacific Asia Conference, page 320--329. (February 2002)
M. Magableh, A. Cau, H. Zedan, and M. Ward. Proceedings of the IADIS International Conferences Collaborative Technologies 2010 and Web Based Communities 2010, page 178--182. (July 2010)