BONIA, K K; GOSWAMI, J. Serum 17β- oestradiol, progesterone and cortisol level during biological stress period of normal and sub-oestrous cycles of crossbred cattle of Asom. The Indian Journal of Animal Sciences, Delhi, India, v. 81, n. 7, 2011. DOI: 10.56093/ijans.v81i7.7716. Disponível em: https://epubs.icar.org.in/index.php/IJAnS/article/view/7716. Acesso em: 11 sep. 2026.