WALKER, H. C. Improvement Fellings. Indian Forester, [S. l.], v. 33, n. 9, p. 416–421, 1907. DOI: 10.36808/if/1907/v33i9/16941. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/16941. Acesso em: 26 dec. 2025.