PURWAR, Vaibhav. Effect of protected fat, yeast, niacin, zinc and chromium supplementation on the productive performance of heat-stressed Karan Fries heifers. Indian Journal of Dairy Science, India, v. 71, n. 3, 2018. Disponível em: https://epubs.icar.org.in/index.php/IJDS/article/view/80677. Acesso em: 25 oct. 2025.