Dassanayake, D. S.; De Silva, R. C. L.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Rajaguru, R. A. M. T. S.; Subramanium, S.S.; De Silva, R. C. L.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Nandasiri, H. I. S. I.; De Silva, R. C. L.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)