Valiullina С. З. ., Gafurova Г. Т. ., & Shevchenko Д. В. . (2025). Participation of Small and Medium-Sized Businesses in Public Procurement as a Factor of Sustainable Development of the Volga Federal Okrug. Economy of Regions, 21(4), 1045–1060. https://doi.org/10.17059/ekon.reg.2025-4-9