RADCLIFFE, R.; BOMMARITO, M.; OSOFSKY, S. Ultrasonography as a tool in the conservation of the black rhinoceros: ex situ and in situ applications. Pachyderm, [S. l.], v. 21, n. 1, p. 55–59, 1996. DOI: 10.69649/pachyderm.v21i1.843. Disponível em: https://pachydermjournal.org/index.php/pachyderm/article/view/843. Acesso em: 7 jul. 2026.