Liu, Di, Yongxiang Zhang, Qiyuan Peng, Wei Wei, and Haitao Li. “Profit-Oriented High-Speed Railway Network Line Planning With Capacity Limitations”. Journal of Modern Mechanical Engineering and Technology 10 (June 3, 2023): 98–112. Accessed May 7, 2024. https://www.zealpress.com/jms/index.php/jmmet/article/view/500.