Izumi, K.; Ranatunga, A.S.; Hector Kobbkaduwa Agrarian Research and Training Institue(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 1974)
Wijetunga, C.S.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 2011)
Hathurusinghe, C.P.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 2007)
Weerakkody, P.R.; Kumara, S.K.; Wickramasinghe, W.D.; Hector Kobbekaduwa Agrarian Research and Training Institute(Hector Kobbekaduwa Agrarian Research and Training Institute:Colombo, 2011)