Kulathilaka, S.H.C.; Amadoru, I.J.; Abeysinghe, D.C.; Gunathilaka, H.A.W.S; Dharmadasa, R.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Amarasinghe, K.G.A.P.K.; Ranasinghe, C.S.; Abeysinghe, D.C.; Perera, A.A.F.L.K.(Senate Research and Higher Degrees Committee, Wayamba University of Sri Lanka, 2017)