Samburov, Kirill. “Typology of Russian Regions by Level of Suburban Railway Transport: Development and Areal Aspects of Management”. Journal of Geography, Politics and Society 7, no. 4 (December 29, 2017): 32–40. Accessed May 19, 2024. https://czasopisma.bg.ug.edu.pl/index.php/JGPS/article/view/3565.