Motha, M.R.; Gajanayake, K.G.M.C.P.B.; Sarukkali, P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Nawarathna Banda, H.M.(Department of Business Management, Faculty of Business Studies and Finance, Wayamba University of Sri Lanka. Kuliyapitiya, 2010)
Prasanga, K.S.; Fernando, C.A.N.; Cooray, M.T.J.; Liyanaarachchi, U.S.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2016)
Wimalachandra, S.D.; Fernando, C.A.N.; Jayasinghe, J.; Abeysinghe, T.M.C.N.B.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2016)
Jayalatharachchi, D.B.; Vivehananthan, K.; De Silva, W.H.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)