Chandana, E.P.S.; Ravindra, R.; Lasanthi, P.; De S, Amarasinghe N. J.; Peiris, L.D.C.; Samayawardhena, L.A.(Sri Lanka Association for the Advancement of Science, Colombo, 2001-11-26)
De Silva, W.A.J.P.; Deepananda, K.H.M.A.; Chandana, E.P.S.; Peiris, L.D.C.; Samayawardhena, L.A.(Sri Lanka Association for the Advancement of Science, Colombo, 2001-11-26)