ACCINELLI, Elvio. Uniqueness of equilibrium in productive economies. Pro Mathematica, [S. l.], v. 16, n. 31-32, p. 115–128, 2002. Disponível em: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/8187. Acesso em: 16 dic. 2025.