Hettiarachchi, A. H .P.; Rajapakse, C. S. K.(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
Dikella, D. G. T. N.; Rajapakse, C. S. K.(Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)