Ranawaka, R. A. C. S.; Perera, W. A. S. N.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Jayathilake, M. V. M.; Shantha, P. H. A. B.(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)