https://blogs.lse.ac.uk/brexit/2020/02/21/migration-how-scotland-hoped-to-do-things-differently/
https://www.socialeurope.eu/2017/07/49234/
https://www.eurofound.europa.eu/sites/default/files/wpef17037.pdf
http://cadmus.eui.eu/bitstream/handle/1814/45187/Ebook_IntegrationMigrantsRefugees2017.pdf?sequence=3&isAllowed=y