KUMAR, Ajay; SINGH, C; SINGH, A P. Circulating concentration of zinc in crossbred cows and heifers. The Indian Journal of Animal Sciences, Delhi, India, v. 76, n. 9, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAnS/article/view/4343. Acesso em: 23 oct. 2025.