Wijerathna, M.M.M.B.; Jayasinghe, J.M.J.W.; Silva, A.S.A.; Weerathunga, B.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2016)
Wijerathna, M.M.M.B.; Jayathilake, Y.M.C.D.; Weerasinghe, W.A.D.S.S.; Bandaranayake, C.M.; Perera, G.A.K.S.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2016)