Костина, Яна, and Марина Аверкина. “SOCIO-ECONOMIC DEVELOPMENT OF SMALL TOWNS”. SWorldJournal 4, no. 08-04 (May 31, 2021): 18–22. Accessed June 27, 2025. https://sworldjournal.com/index.php/swj/article/view/swj08-04-059.