Warnakulasuriya, M. M.; Vidanagamachchi, K.; Niwunhella, D. H. H.; Nanayakkara, L. D. J. F.(4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Niwunhella, D. H. H.; Rupasinghe, T. D.(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)