Edirisinghe, D.P.D.S.; Athauda, A.M.T.P.; Yapa, G.B.; Jayawardana, C.P.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Senevirathne, J.A.; Athauda, A.M.T.P.; Edirisinghe, D.P.D.S.; Anjalee, G.H.I.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Kulathunga, P.S.S.H.; Edirisinghe, D.P.D.S.; Athauda, A.M.T.P.; Anjalee, G.H.I.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)