Pagthinathan, M.; Perera, E.R.K.; Wijayagunawardane, M.P.B.; Perera, A.N.F.; Kaduwela, S.C.; Perera, K.A.(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2002)
Mahusoon, M.M.; Perera, A.N.F.; Jayawardena, V.P.; Perera, E.R.K.; Perera, K.A.(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2002)