Sisirakumara, M.A.K.W.; Wickramasinghe, W.M.P.M.; Karunananda, G.A.C.M.(Faculty of Applied Sciences, Wayamba University of Sri Lanka:Kuliyapitiya, 2016)
Senevirathna, T.M.P.G.R.G.; Dharmawardane, P.M.N.; Wickramasinghe, W.M.P.M.(Faculty of Applied Sciences, Wayamba University of Sri Lanka:Kuliyapitiya, 2016)