VALLE GÁLVEZ, A. del. The Gibraltar crisis and the measures, options and strategies open to Spain. Cuadernos de Gibraltar – Gibraltar Reports, [S. l.], n. 01, p. 135–147, 2018. Disponível em: https://revistas.uca.es/index.php/cdg/article/view/4585. Acesso em: 4 feb. 2026.