Wang, Xin, and Hai-Jun Huang. “Bi-Criteria System Optimum Traffic Assignment in Networks With Continuous Value of Time”. Promet - Traffic&Transportation 25, no. 2 (April 26, 2013): 119–125. Accessed October 26, 2025. https://traffic2.fpz.hr/index.php/PROMTT/article/view/2388.