SÁENZ-FRANCÉS SAN BALDOMERO, E. Las fronteras de la actualidad. Comillas Journal of International Relations, [S. l.], n. 3, p. I-II, 2015. Disponível em: https://revistas.comillas.edu/index.php/internationalrelations/article/view/5530. Acesso em: 4 may. 2024.