González-Enríquez, Carmen, and Jose Pablo Martínez Romera. “Spanish High Qualified Migration After the Crisis. A Comparison With Italian, Greek and Portuguese High Qualified Migrations”. Migraciones. Publicación del Instituto Universitario de Estudios sobre Migraciones, no. 43 (December 22, 2017): 117–145. Accessed March 13, 2026. https://revistas.comillas.edu/revistamigraciones/article/view/7876.