Chuang, Jones Pi-Chang, and Peter Chu. “Improving the Public Transit System for Routes With Scheduled Headways”. Yugoslav Journal of Operations Research 24, no. 2 (June 1, 2014): 237–248. Accessed August 26, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/393.