Смирнов, Илья Петрович, and Олим Тимурович Умаров. “Socio-Economic Situation in Single-Industry Towns Central Federal District”. HERALD OF TVER STATE UNIVERSITY. SERIES: GEOGRAPHY AND GEOECOLOGY, no. 4 (February 28, 2019): 82–95. Accessed September 23, 2026. https://journal.tversu.ru/index.php/geo/article/view/101.