Rajapaksha, R. M. D. M.; Dhananjaya, S.S.; Wijesuriya, M. W. A. S. H.; Fernando, K. M. S.; Ranaweera, A. L. A. K.; Kalingamudali, S. R. D.
(proceedings of the 4th International Research Symposium on Pure and Applied Sciences 2019, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)