Kangana, U. S.; Illeperuma, I. A. K. S.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Vaigunthan, T.; Lansakara, L. M. A. P.; Weerasinghe, V. P. A.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)