Kornus, Anatolii, Olesya Kornus, and Volodymyr Shyschuk. “QUALITY OF THE ENVIRONMENT AND MEDICAL-GEOGRAPHICAL SITUATION IN THE SUMY REGION”. Human Geography Journal 19, no. 2 (January 12, 2016): 144-151. Accessed December 6, 2025. https://periodicals.karazin.ua/socecongeo/article/view/4706.