Premachandra, W.T.S.D.; Amarasinghe, L.D.; Wickremasinghe, M.G.V.(Proceedings of the 53rd Annual sessions of the Sri Lanka Association for the Advancement of Science, 1997)
Amarasinghe, L.D.; Sivanesan, M.; Abeysinghe, I.S.B.(Proceedings of the 19th Annual Sessions of the Institute of Biology of Sri Lanka, September, 1999)
Premachandra, W.T.S.D.; Amarasinghe, L.D.; Wegiriya, H.C.E.(Proceedings of the 18th Annual sessions of the Institute of Biology of Sri Lanka, September, 1998)