Yao, Baozhen, Qingda Cao, Lu Jin, Mingheng Zhang, and Yibing Zhao. “Circle Line Optimization of Shuttle Bus in Central Business District Without Transit Hub”. Promet - Traffic&Transportation 29, no. 1 (February 14, 2017): 45-55. Accessed March 28, 2024. https://traffic.fpz.hr/index.php/PROMTT/article/view/2015.