Samarasekara, D.T.M.W.; Weerasinghe, W.A.D.S.S.; Jayathilaka, Y.M.C.D.; Vidanapathirana, K.P.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2015)
De Silva, J.A.Y.P.; Gajanayake, B.; Priyadarshana, L.B.M.D.L.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)