Hua, Xuedong, Wei Wang, Yinhai Wang, and Min Ren. “Bus Arrival Time Prediction Using Mixed Multi-Route Arrival Time Data at Previous Stop”. Transport 33, no. 2 (January 26, 2018): 543–554. Accessed August 15, 2020. https://journals.vgtu.lt/index.php/Transport/article/view/162.