BOARD, E. Mine and return. Journal of Mines, Metals and Fuels, [S. l.], v. 69, n. 6, p. 197–198, 2021. DOI: 10.18311/jmmf/2021/28529. Disponível em: https://informaticsjournals.com/index.php/jmmf/article/view/28529. Acesso em: 25 apr. 2024.