Dilini, N. I.; Wimaladharma, N. A. S. N.(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
Katugampala, K. D. W. J.; De Silva, L. N. K.(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)