VASHEGHANI, Javad; ZANDI, Fatemeh; AFSHARIRAD, Majid; KHEZRI, Mohammad. Study of Fuzzy Logic to Estimate the Size of the Underground Economy in Iran. Business, Marketing, and Finance Open, [S. l.], p. 1–11, 2025. Disponível em: https://bmfopen.com/index.php/bmfopen/article/view/189.. Acesso em: 14 may. 2025.