MANN, Gustav. Report on Caoutchouc Plantations in Assam, and the Yield of Caoutchouc form Ficus Elastica. Indian Forester, [S. l.], v. 1, n. 2, p. 124–141, DOI: 10.36808/if/1875/v1i2/13195. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/13195. Acesso em: 4 dec. 2025.