HAO, Yu. Development and Safety Analysis for Low Concentration Coal-bed Methane Liquefaction Equipment. International Journal of Computer Science and Information Technology, U.K., v. 3, n. 3, p. 332–335, 2024. DOI: 10.62051/ijcsit.v3n3.34. Disponível em: https://wepub.org/index.php/IJCSIT/article/view/3147. Acesso em: 9 may. 2026.