Smirnov И. П. and Sabonis В. Е. (2021) “Sub-medium cities as a special category of small cities in Central Russia”, HERALD OF TVER STATE UNIVERSITY. SERIES: GEOGRAPHY AND GEOECOLOGY, (3 (35), pp. 17–27. Available at: https://journal.tversu.ru/index.php/geo/article/view/287 (Accessed: 13 November 2024).