Yuan, Guang, Dewen Kong, Lishan Sun, Wei Luo, and Yan Xu. “Connectivity Contribution to Urban Hub Network Based on Super Network Theory – Case Study of Beijing”. Promet - Traffic&Transportation 33, no. 1 (February 1, 2021): 35–47. Accessed August 26, 2025. https://traffic2.fpz.hr/index.php/PROMTT/article/view/2908.