ORGANIZATIONAL AND METHODOLOGICAL ASPECTS OF CONTRACT SYSTEM IN PUBLIC PROCUREMENT MANAGEMENT. Economic Environment, [S. l.], v. 9, n. 3, p. 43–49, 2020. DOI: 10.36683/2306-1758/2020.03/43-49. Disponível em: https://econenv.owebs.ru/article/view/3661. Acesso em: 28 sep. 2026.