Borowska-Stefanska, Marta, and Szymon Wisniewski. “Vehicle Routing Problem As Urban Public Transport Optimization Tool”.
Computer Assisted Methods in Engineering and Science 23, no. 4 (September 17, 2017): 213–229. Accessed May 8, 2025.
https://cames3.ippt.pan.pl/index.php/cames/article/view/184.