Perera, B.S.P.S.S.; Fernandopulle, M.N.D.; Sherath, C.S.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Athukorala, A.C.H.; Jayasinghe-Mudalige, U.K.; Silva, K.D.R.R.; Chadrasekera, G.A.P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2006)
Ekanayake, N.R.C.D.B.; Amarasinghe, K.G.A.P.K.; Gajanayake, B.; Ranasinghe, C.S.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Edirisinghe, J.C.; Ranaweera, B.; Weerakkody, W.J.S.K.; Herath, H.M.L.K.; Jayatilake, H.A.C.K.(Senate Research and Higher Degrees Committee, Wayamba University of Sri Lanka, 2017)
Pathiraja, P.M.A.S.; Ranaweera, B.; Rathnayake, R.H.M.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)