RAMASWAMI, S. Producer Gas from Charcoal. Indian Forester, [S. l.], v. 60, n. 2, p. 112–115, 1934. DOI: 10.36808/if/1934/v60i2/20608. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/20608. Acesso em: 10 jul. 2025.