KASIANOVA, Valeriia. MATHEMATICAL FORMALIZATION OF THE ECONOMIC SUSTAINABLE DEVELOPMENT INSTITUTE IN THE CONTEXT OF THE NATIONAL ECONOMY COMPETITIVENESS. Social Development: Economic and Legal Issues, [S. l.], n. 17, 2026. DOI: 10.70651/3083-6018/2026.5.19. Disponível em: https://www.eu-scientists.com/index.php/sdel/article/view/844. Acesso em: 30 jun. 2026.