VAID, K. M. Animal Instinct and Intelligence. Indian Forester, [S. l.], v. 90, n. 4, p. 228–228, 1964. DOI: 10.36808/if/1964/v90i4/24976. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/24976. Acesso em: 4 dec. 2025.