Siriwardhana, I.D.; Athauda, A.M.T.P.; Herath Banda, R.M.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Herath, H.M.D.T.K.; Atauda, A.M.T.P.; Edirisinghe, J.C.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Subasinghe, S.A.M.S.; Abeynayake, N.R.; Shyamale, H.W.; Wellala, N.N.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Hettiarachchi, L.G.; Wijesuriya, W.; Nugawela, A.; Sankalpa, J.K.S.; Karunaratne, S.B.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Hapuarachchi, H.A.C.L.; Herath, H.M.L.K.; Disaanayake, D.M.A.P.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)