Kariyawasam, C.; Jayanandana, A.D.C.; Kularatne, M.D.U.; Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 1984)
Panabokke, C.R.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 2009)
Gunawardena, A.M.T.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarain Research and Training Institute:Colombo, 1981)