GOELEVEN, D. An Expository Discussion on Singular Inequality Problems and Equilibrium Models in Economics. CUBO, A Mathematical Journal, [S. l.], v. 6, n. 1, p. 159–186, 2004. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1653. Acesso em: 11 oct. 2025.