Muthumali, A.M.T.; Wickramarachchi, P.A.S.R.(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
Pathirannehe, P. N. S.; Fernando, T. D.; Rajapakse, C. S. K.(Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)