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)
Lokugama, K.P.G.S.; Weerawardene, N.D.R.; Werrakkody, W.J.S.K.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Rajathewa, R.M.A.D.H.; Kelaniyangoda, D.B.; De Silva, R.S.Y.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Wijerathna, M.M.M.B.; Jayathilake, Y.M.C.D.; Weerasinghe, W.A.D.S.S.; Bandaranayake, C.M.; Perera, G.A.K.S.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2016)
Sathiyakumar, S.; Samarakoon, K.W.; Jayasekera, S.J.B.A.; Ranasinghe, P.; Dharmadasa, R.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)