Medhavi, P.I.H.R.; Samarasinghe, D.G.S.N.; Herath, H.(Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
Abeykoon, A.M.S.K.; Basnayake, B.M.V.S.; Salim, N.(Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)