MONOWAR, S A L; SINGH, C. Blood urea concentration in crossbred (Friesian x Hariana) heifers and lactating cows. The Indian Journal of Animal Sciences, Delhi, India, v. 74, n. 4, 2014. Disponível em: https://epubs.icar.org.in/index.php/IJAnS/article/view/38469. Acesso em: 23 oct. 2025.