Pathirana, H.N.I.; Amarasinghe, L.D.; Dharmasena, C.M.D.(Proceedings of the 60th Annual sessions of the Sri Lanka Association for the Advancement of Science, 2004)
Mohottige, C.S.N.; Amarasinghe, L.D.(Poster presentation at Proceedings of the 60th Annual sessions of the Sri Lanka Association for the Advancement of Science, 2004)