1. Spielman, D. J., and Smale, M., Policy options to accelerate variety change among smallholder farmers in South Asia and Africa South of the Sahara. International Food Policy Research Institute (IFPRI) Discussion Paper Series. 2017
2. Virk, D. S., The regulatory framework for varietal testing and release in India. Seeds of Choice: Making the Most of New Varieties for Small Farmers. 1998. Pp. 69-84
3. Tandon, J.P., Sharma, S.P., Sandhu, J.S., Yadava, D.K., Prabhu K.V., and Yadav, O.P., Guidelines for Testing Crop Varieties under the All-India Coordinated Crop Improvement Projects, Indian Council of Agricultural Research, New Delhi, India. 2015
4. Singh, B.D., A textbook of plant breeding, Kalyani publishers. ISBN 81-272-2408-1. 1999. Pp.391-400
5. Chopra, V. L., Plant Breeding: Theory and Practice, Oxford & IBH Publishing Company. 1989. Pp. 110