1 Samantha, N. P. G.; Vidanapathirana, R.; Rambukwella, R. 2013. Issues in big onion seed production and marketing. Colombo, Sri Lanka: Hector Kobbekaduwa Agrarian Research and Training Institute (HARTI). 45p. (HARTI Research Report 150)
2 Chandrasiri, J. K. M. D.; Wijetunga, C. S.; Bamunuarachchi, B. A. D. S. 2013. Govijana benku wedasatahana pilibanda karya sadhana agayem adyanaya. In Sinhalese. [Appraisal of the Agrarian Bank Programme]. Colombo, Sri Lanka: Hector Kobbekaduwa Agrarian Research and Training Institute (HARTI). 119p. (HARTI Research Report 56)