Duminda, D.M.S.; Pathiratne, K.A.S.; Somasiri, L.L.W.(Proceedings of the Annual Research Symposium 2005-Faculty of Graduate Studies, University of Kelaniya, 2005)
Duminda, D.M.S.; Pathiratne, K.A.S.; Somasiri, L.L.W.(Proceedings of the Annual Research Symposium 2005-Faculty of Graduate Studies, University of Kelaniya, 2005)