XING, Liru. Study on Seepage of Coalbed Methane in Pore-fracture Double - porosity Medium. International Journal of Natural Resources and Environmental Studies, [S. l.], v. 2, n. 1, p. 165–171, 2024. DOI: 10.62051/10.62051/ijnres.v2n1.19. Disponível em: https://wepub.org/index.php/IJNRES/article/view/1228. Acesso em: 7 nov. 2025.