Samarakkody, G.S.; Kumarayapa, Y.A.A.; Wijesinghe, K.; Gunasekara, M.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2016)
Wijepala, S.A.T.P.; Lakmali, W.A.S.; Alawathugoda, R.M.D.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Muhsin, A.M.I.; Fernando, M.T.N.; Athauda, A.M.T.P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)