KUME, H.; PIANI, G. Mercosur: the dilemma between the customs union and a free trade area. Brazilian Journal of Political Economy, [S. l.], v. 25, n. 4, p. 370-390, 2005. Disponível em: https://centrodeeconomiapolitica.org/repojs/index.php/journal/article/view/648. Acesso em: 25 apr. 2024.