Chadrasekera, C.M.C.P.; Perera, D.A.M.; Abeysinghe, D.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Jayawardene, G.M.M.U.; Athauda, A.M.T.P.; Abeynayake, N.R.; Herath, H.M.T.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Madhushani, R.D.T.D.; Athauda, A.M.T.P.; Wijeyewardena, H.M.S.L.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Amanullah, M.K.M.; Fernanado, M.T.N.; Athauda, A.M.T.P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Yatawatte, H.S.; Gamage, H.D.H.; Kariyawasam, K.A.H.; Ekanayaka, W.H.H.; De Silva, W.S.D.; Gunawardana, M.M.D. De S.(Faculty of Applied Sciences, Wayamba University of Sri Lanka:Kuliyapitiya, 2011)