STRUCTURE OF THE SHADOW ECONOMY. International Journal of Economic Integration and Regional Competitiveness, [S. l.], v. 1, n. 1, p. 81–83, 2023. DOI: 10.61796/ijeirc.v1i1.26. Disponível em: https://e-journal.antispublisher.id/index.php/IJEIRC/article/view/26. Acesso em: 7 dec. 2025.