Gunawardana, M.H.M.A.S.V; Abeysekara, R.I.; Dissanayaka, N.P.; Kodikara, K.A.S.; Jayatissa, L.P.(Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2019-01-30)
Samarathunga, P.T.D.; Mutugama, M.T.C.; Hapugahawatte, H.W.S.T.; Pathmathilaka, R.; Jayasundera, S.(Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2019-01-30)