Nawarathna, H.M.D.S.K.; Bandara, J.A.S.D.; Weerasinghe, S.; Adikari, A.M.G.C.P.(Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2021-02-17)
Manawadu, H. C.; Chathumalee, M. A. D. D.; Bulugahapitiya, V.P.; Raigamkoralage, R.(Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2021-02-17)