KNIGHT, M.; HITCHINS, P.; ERB, K. An aerial survey of rhinoceros and elephant in a portion of the Chobe National Park and surrounding areas, northern Botswana, September 1992. Pachyderm, [S. l.], v. 17, n. 1, p. 64–74, 1993. Disponível em: https://pachydermjournal.org/index.php/pachyderm/article/view/785. Acesso em: 3 jul. 2024.