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