Mihindukulasuriya, R.H.; Dassanayake, E.M.; Perera, W.G.S.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Disaanayaka, D.M.S.; Kottearachchi, N.S.; Weerasena, O.V.D.S.J.; Peiris, W.A.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Rajapakshe, B.N.K.; Wickramaarachchi, W.A.R.T.; Kottearachchi, N.S.; Dissanayake, D.M.K.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)