Li, Shuang, Wei Deng, and Yisheng Lv. “Combined Modal Split and Assignment Model for the Multimodal Transportation Network of the Economic Circle in China”. Transport 24, no. 3 (September 30, 2009): 241–248. Accessed August 17, 2025. https://jbem.vilniustech.lt/index.php/Transport/article/view/6311.