EASA, P. S.; JAHAS, S. A. Sabu. A Demograpidc Study of Elephant Population in Periyar Tiger Reserve and Adjacent Areas in Kerala. Indian Forester, [S. l.], v. 128, n. 2, p. 217–227, 2002. DOI: 10.36808/if/2002/v128i2/2479. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/2479. Acesso em: 4 dec. 2025.