Weerasinghe, W.K.G.K.S.; Weerakkody, W.J.S.K.; Jayathilake, H.A.C.K.; Yakandawala, K.(Senate Research and Higher Degrees Committee, Wayamba University of Sri Lanka, 2017)
Fernando, C.N.; Yakandawala, K.; Attanayaka, D.P.S.T.G.; Perera, P.I.P.(Senate Research and Higher Degrees Committee, Wayamba University of Sri Lanka, 2017)