PAL, Yash; GUPTA, A K. Oestrous cyclicity, follicle development and progesterone profile in indigenous donkeys and ponies. The Indian Journal of Animal Sciences, Delhi, India, v. 75, n. 12, 2005. Disponível em: https://epubs.icar.org.in/index.php/IJAnS/article/view/9402. Acesso em: 23 oct. 2025.