BULA, I. Discontinuous functions in gale economic model. Mathematical Modelling and Analysis, [S. l.], v. 8, n. 2, p. 93–102, 2003. DOI: 10.3846/13926292.2003.9637214. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/9766. Acesso em: 3 jul. 2025.