TSACHEV, Tsvetomir; VASSILEVA, Iglika. Fiscal policy options for reducing informality in an economy with fiscal rules. Serdica Mathematical Journal, Sofia, Bulgaria, v. 49, n. 1–3, p. 205–230, 2023. DOI: 10.55630/serdica.2023.49.205-230. Disponível em: https://serdica.math.bas.bg/index.php/serdica/article/view/42. Acesso em: 25 oct. 2026.