Weerasekera, N.D.K.; Jayasinghe-Mudalige, U.K.; Ikram, S.M.M.; Udugama, J.M.M.; Herath, H.M.T.K.; Edirisinghe, J.C.; Herath, H.M.L.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Wijewardhana, W.G.L.P.; Edirisinghe, J.; Auwardt, D.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Mayooran, P.; Fernando, L.C.P.; Fernandopulle, M.N.D.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)