Сідоров, Вадим, and Георгий Ревякін. “Economic Crises Detecting: Laws of Their Functioning”. The Journal of V. N. Karazin Kharkiv National University. Series: International Relations. Economics. Country Studies. Tourism, no. 4 (1144, 2 (1): 133-136. Accessed December 4, 2024. https://periodicals.karazin.ua/irtb/article/view/4537.