Dharmasena, T.H.Y.; Piyadasa, R.U.K.; Weerasinghe, K.D.N.; Liyanage, J.A.; Weerasinghe, W.A.D.C.S.(Sri Lanka Association for the Advancement of Science, 2008)
Abeyrathna, H.M.W.N.; Kariyawasam, I.S.; Jinendra, B.M.S.; Weerasinghe, K.D.N.; Liyanage, J.A.(Sri Lanka Association for the Advancement of Science, 2005)