Kovalevska, Alla, Roksana Petrova, and Sergiy Zelenskiy. “Sustainable Development of Cities: The Essence of Concept and Implementation Background”. Social Economics 53, no. 1 (December 5, 2017): 69-75. Accessed December 21, 2024. https://periodicals.karazin.ua/soceconom/article/view/9775.