T. Vijayakumar, V.Nivedhitha, K.Deeba, and M. Bama. International Journal of Computer Science, Engineering and Information Technology (IJCSEIT), 2 (1):
35-43(February 2012)
M. Cline, and G. Powers. Frontiers in Education Conference, 1997. 27th Annual Conference. Teaching and Learning in an Era of Change. Proceedings., 1, page 350-354. (November 1997)