Hozhenko, Liudmyla, and Sergii Siutkin. “Territorial Differentiation of the Language Situation in Sumy Region As a Factor of Formation of Regional Identity ”. Human Geography Journal 30 (June 10, 2021): 59-66. Accessed May 6, 2024. https://periodicals.karazin.ua/socecongeo/article/view/17775.