Xia, Jisheng, Pinliang Dong, and Zhifang Zhao. “Selecting Inter-City Transportation Routes in Complex Terrains Using Quantitative Methods – A Case Study from Northern Yunnan, China”. Promet - Traffic&Transportation 32, no. 2 (March 27, 2020): 269-277. Accessed March 28, 2024. http://traffic.fpz.hr/index.php/PROMTT/article/view/3250.