Wang, Yadi, Xiaochun Lu, and Yang Wang. “Evaluating the Market Share of China Railway Express Lines – A Data-Driven Approach”. Promet - Traffic&Transportation 32, no. 1 (February 6, 2020): 91-101. Accessed February 18, 2020. http://traffic.fpz.hr/index.php/PROMTT/article/view/3302.