YU, Yi. Analysis on Beijing Urban Underground Railway Operation. Journal of Education, Humanities and Social Sciences, [S. l.], v. 35, p. 575–581, 2024. DOI: 10.54097/zt08h477. Disponível em: https://drpress.org/ojs/index.php/EHSS/article/view/22757. Acesso em: 25 jun. 2026.