González-Enríquez, C. and Martínez Romera, J.P. (2017) “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, (43), pp. 117–145. doi:10.14422/mig.i43.y2017.006.