Kaushalya, G. G. S.; Karunaratne, M. M. S. C.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Jayasundara, S. M. J. C. K.; Ganehiarachchi, G. A. S. M.(Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)