Zhang, Yagang, Dingli Qi, Wei Jiang, and Shuang Lei. “Optimal Allocation of Changing Station for Electric Vehicle Based on Queuing Theory”. Promet - Traffic&Transportation 28, no. 5 (November 2, 2016): 497-505. Accessed July 7, 2020. http://traffic.fpz.hr/index.php/PROMTT/article/view/1974.