KADER, Azraa; MOHAMMADI, Amir Hossein. An Overview of Underground Coal Gasification: -. jeecpjournal, [S. l.], v. 2, n. 4, p. 115–127, 2026. Disponível em: https://jeecpjournal.com/index.php/jeecp/article/view/30.. Acesso em: 27 mar. 2026.