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)
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)