The construction of walls and border protection by the European Union in the face of the refugee crisis. Revista de Estudios Europeos, [S. l.], n. 79, p. 210–226, 2021. DOI: 10.24197/ree.79.2022.210-226. Disponível em: https://revistas.uva.es/index.php/ree/article/view/5715. Acesso em: 8 jan. 2026.