KARENOV , R.S. Social and economic efficiency degassing and methane production from coal seams in Kazakhstan . BUKETOV BUSINESS REVIEW, [S. l.], v. 90, n. 2, p. 11–20, 2018. Disponível em: https://bbr.buketov.edu.kz/index.php/economy-vestnik/article/view/423. Acesso em: 29 nov. 2025.