Dissnayake, D. M. D. S. M.; Jayasinghe, V.; Gunawardena, M. P.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Dissanakayake, D. M. D. S. M.; Gunawardena, M. P.; Hathurusinghe, D.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)