Public Expenditures Through Public Procurement. European Journal of Formal Sciences and Engineering, [S. l.], v. 7, n. 1, p. 50–64, 2019. DOI: 10.26417/ejef.v2i2.p40-49. Disponível em: https://revistia.com/index.php/ejfe/article/view/3275. Acesso em: 10 jan. 2026.