YONGWU, Zheng; CHONGCONG, Zhang; JIAN, Zhang. The coordinated development of Beijing-Tianjing-Hebei urban research. Advances in Social Sciences Research Journal, [S. l.], v. 2, n. 12, 2015. DOI: 10.14738/assrj.212.1721. Disponível em: https://scholarpublishing.org/journals/index.php/ASSRJ/article/view/6787. Acesso em: 28 may. 2026.