GIRDHAR, NARESH, et al. “Effect of Different Planes of Nutrition and Mineral Supplementation on growth,nutrients Utilization and Semen Quality of Frieswal Bull Calves”. The Indian Journal of Animal Sciences, vol. 79, no. 6, Jan. 2011, https://epubs.icar.org.in/index.php/IJAnS/article/view/2913.