Gunathilake, SJ.K.M.R.S.; Prashantha, M.A.B.; Cooray, P.L.A.T.(Proceedings of the Peradeniya University International Research Sessions, Sri Lanka, 2016)
Gunathilake, S.J.K.M.R.S.; Prashantha, M.A.B.; Cooray, P.L.A.T.(Proceedings of the Wayamba University International Conference, Sri Lanka, 19-20 August 2016, 2016)