NAHA, Binoy. Studies on age at first semen freezing and age at first semen use of Sahiwal bulls. Indian Journal of Dairy Science, India, v. 69, n. 1, 2015. Disponível em: https://epubs.icar.org.in/index.php/IJDS/article/view/46642. Acesso em: 21 jun. 2026.