Li, Linbo, Mengfei Cao, Jiajun Yin, Yanli Wang, and Yahua Zhang. “Spatial Distribution of Travel Activities and Its Relationship With Points of Interest”. Promet - Traffic&Transportation 33, no. 1 (January 31, 2021): 1-16. Accessed June 17, 2021. https://traffic.fpz.hr/index.php/PROMTT/article/view/3462.