Lu, Ke, and Heng Du. “Pricing Decisions for Competitive Ride-Hailing Platforms With the Combination of Inner-Group and Inter-Group Network Externalities”. Promet - Traffic&Transportation 36, no. 1 (March 1, 2024): 147–163. Accessed July 21, 2024. https://traffic2.fpz.hr/index.php/PROMTT/article/view/320.