Gupta, S. C., P. C. Sawhney, N. D. Kehar, and P. R. Sreenath. “Metabolic Behaviour of Adult Hill Cattle As Affected by Different Levels of Protein Intake”. The Indian Journal of Nutrition and Dietetics, vol. 10, no. 4, July 1973, pp. 191-7, http://informaticsjournals.com/index.php/ijnd/article/view/10469.