KOUKOUZAS, N.; KATSIMPARDI, I.; MERACHEV, D. Simulation of underground coal gasification process in a Bulgarian coal field. Bulletin of the Geological Society of Greece, [S. l.], v. 47, n. 4, p. 2090–2100, 2013. DOI: 10.12681/bgsg.11093. Disponível em: https://ejournals.epublishing.ekt.gr/index.php/geosociety/article/view/11093. Acesso em: 18 nov. 2024.