Siriwardana, N.S.B.; Zuhry, A.L.M.; Weerakkody, W.J.S.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Pathirana, H.P.D.A.; Jayathilake,Y.M.C.D.; Weerasinghe, W.A.D.S.S.; Perera, K.S.(Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya, 2015)
Siriwardhana, S.M.T.T.; Samarasinghe, W.L.G.; Gimhani, D.R.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)