KRYVOKULSKA, Nataliia. “COMMERCIAL ACTIVITY IN THE SYSTEM OF A MULTILEVEL SUSTAINABLE DEVELOPMENT ECONOMY”. Regional aspects of productive forces development of Ukraine 1, no. 31 (June 14, 2026): 4–19. Accessed July 15, 2026. https://rarrpsu.wunu.edu.ua/index.php/rapfdu/article/view/608.