SINGH, S P; GANGWAR, B. Economics of crop and livestock production in Uttar Pradesh. The Indian Journal of Animal Sciences, Delhi, India, v. 80, n. 9, 2010. DOI: 10.56093/ijans.v80i9.902. Disponível em: https://epubs.icar.org.in/index.php/IJAnS/article/view/902. Acesso em: 4 oct. 2026.