Instinct in Animals. Indian Forester, [S. l.], v. 38, n. 4, p. 187–187, 1912. DOI: 10.36808/if/1912/v38i4/17604. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/17604. Acesso em: 4 dec. 2025.