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)
Dewagedara, D.M.A.E.I.; Wijesinghe, S.A.E.C.; Rathnayake, R.H.M.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)