Weerasinghe, R. K. L.; Wickramasinghe, I.; Somendrika, M. A. D.(Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
Perera, T. W. N. K.; Amarakoon, R.; Edirisinghe, E. A. A. D.(Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)