https://www.socialeurope.eu/2017/06/theresa-mays-other-citizens-of-nowhere/
https://www.esri.ie/system/files/publications/RS185_0.pdf
http://cadmus.eui.eu/bitstream/handle/1814/45187/Ebook_IntegrationMigrantsRefugees2017.pdf?sequence=3&isAllowed=y
https://theconversation.com/migracion-expulsion-y-desplazamiento-asi-ha-sido-la-diaspora-palestina-215941