RAMSAY, E. Hormonal evaluations of rhino oestrus cycles and pregnancy. Pachyderm, [S. l.], v. 9, n. 1, p. 23–25, 1987. DOI: 10.69649/pachyderm.v9i1.657. Disponível em: https://pachydermjournal.org/index.php/pachyderm/article/view/657. Acesso em: 28 apr. 2026.