MERZ, G. Southern Sudan elephant still suffer. Pachyderm, [S. l.], v. 4, n. 1, p. 18–18, 1984. DOI: 10.69649/pachyderm.v4i1.604. Disponível em: https://pachydermjournal.org/index.php/pachyderm/article/view/604. Acesso em: 3 may. 2026.