ATTIA, N.; BERENGER, V. Social Protection Convergence in the European Union: Impact of Maastricht Treaty. Panoeconomicus, [S. l.], v. 54, n. 4, p. 469–487, 2007. DOI: 10.2298/PAN0704469A. Disponível em: http://www.panoeconomicus.org/index.php/jorunal/article/view/293. Acesso em: 3 may. 2024.