Valiullina С. З. .; Gafurova Г. Т. .; Shevchenko Д. В. . Participation of Small and Medium-Sized Businesses in Public Procurement as a Factor of Sustainable Development of the Volga Federal Okrug. Economy of Regions, [S. l.], v. 21, n. 4, p. 1045–1060, 2025. DOI: 10.17059/ekon.reg.2025-4-9. Disponível em: https://economyofregions.org/ojs/index.php/er/article/view/1229. Acesso em: 17 dec. 2025.