Dharmawardane, P.M.N.; Piyadasa, R A D; Wickramasuriya, S B P(Proceedings of the Annual Research Symposium 2005-Faculty of Graduate Studies, University of Kelaniya, 2005)
Wickramasuriya, S B P; Wimaladharma, N A S N(Proceedings of the Annual Research Symposium 2005-Faculty of Graduate Studies, University of Kelaniya, 2005)