Sleepers for Railways. Indian Forester, [S. l.], v. 22, n. 8, p. 321–321, DOI: 10.36808/if/1896/v22i8/15670. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/15670. Acesso em: 21 feb. 2026.