Dewagedara, D.M.A.E.I.; Wijesinghe, S.A.E.C.; Rathnayake, R.H.M.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Abeyrathna, K.A.S.L.; Edirisinghe, E.R.S.P.; Wijesinghe, S.A.E.C.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Madhushani, P.V.N.; Wijesinghe, S.A.E.C.; Attanayaka, D.P.S.T.G.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Pallawala, P.A.P.M.; Wijesinghe, S.A.E.C.; Yakandawala, K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)