Perera, P.A.A.; Amarasekara, C.D.; Jayakody, J.R.P.; Punyasena, M.A.(Proceedings of the 18th Technical Session of the Institute of Physics - Sri Lanka, 2002)
Jayakody, J.R.P.; Punyasena, M.A.; Perera, P.A.A.; Amarasekara, C.D.; Kumarasinghe, M.A.S.(Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, 2002)
Perera, P.A.A.; Amarasekara, C.D.; Jayakody, J.R.P.; Punyasena, M.A.(Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, 2002)