HATFIELD, William. Observations on the circumstances producing ignition in charcoal in atmospheric temperatures. South African Quarterly Journal, Cape Colony, v. 2, n. 1, p. 71–74, 1833. DOI: 10.21504/saqj.21.2696. Disponível em: https://journal.ru.ac.za/index.php/saqj/article/view/2696. Acesso em: 20 nov. 2025.