BOUCHÉ, P. Northern Ghana elephant survey. Pachyderm, [S. l.], v. 42, p. 57–68, 2007. DOI: 10.69649/pachyderm.v42i.110. Disponível em: https://pachydermjournal.org/index.php/pachyderm/article/view/110. Acesso em: 27 apr. 2026.