Bandara, E.G.C.D.; Mudalige, Jayasinghe U.K.; Udugama, J.M.M.; Attanayake, A.M.C.M.; Edirisinghe, J.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Liyanagama, N.L.; Nugawela, R.C.W.M.R.A.; Attanayaka, D.P.S.T.G.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Perera, H.S.R.; Udugama, J.M.M.; Jayasinghe-Mudalige, U.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)