Aththanayaka, A.M.L.; Rupasingha, L.; Attanayaka, D.P.S.T.G.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Basnayake, B.M.S.; Fernandopulle, M.N.D.; Sumanasena, H.A.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Siriwadhana, S.K.S.N.; Amarasinghe, K.G.A.P.K.; Abeysinghe, D.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Kaushalya, M.G.M.T.; Disaanayake, D.M.P.S.; Weerakkody, W.J.S.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Thilina, M.A.D.P.; Edirisinghe, J.C.; Harischandra, J.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)