SINGH, SULTAN, et al. “Response of Bhadawari Buffalo Calves to Dietary Protein Levels for Intake, Nutrients Utilization, N Balance, Nutrient Efficiency and Growth Performance”. The Indian Journal of Animal Sciences, vol. 79, no. 12, Jan. 2011, https://epubs.icar.org.in/index.php/IJAnS/article/view/3024.