Somasiri, S.C.; Premaratne, S.; Gunathilake, H.A.J.; Abeysoma, H.A.; Satsara, T.H.M.N.(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2010)
Saparamadu, M.D.J.S.; Weerakkody, W.A.P.; Gunawardhana, H.D.; Wijesekera, R.D.(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2008)