PROPERTIES OF COAL, PROCESSES IN COAL MINING COMPANIES, METHODS OF COAL MINING IN THE WORLD. JournalNX - A Multidisciplinary Peer Reviewed Journal, [S. l.], v. 7, n. 10, p. 231–236, 2021. DOI: 10.17605/OSF.IO/32N4G. Disponível em: https://repo.journalnx.com/index.php/nx/article/view/3681. Acesso em: 1 aug. 2025.