Gamage, D. G. N. D.; Abeysinghe, D. C.; Wijesekara, R. G. S.; Prathapasinghe, G. A.; Dharmadasa, R. M.; Someya, T.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Hettiarachchi, H. A. C. O.; Gunathilake, K. D. P. P.; Jayatilake, S.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)