Wanninayakea, P. C. U.; Yapa, P. N.; Malaviarachchi, M. A. P. W. K.; Hettiarachchi, R. P.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
De Silva, J. S. R.; Yapa, P. I.; Bandara, R.; Seneviratne, M. A.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)