https://www.llri.lt/wp-content/uploads/2018/06/Labour-Migration_3.pdf
https://www.migrationpolicy.org/news/eu-pact-migration-asylum-bold-move-avoid-abyss
https://www.opendemocracy.net/uk/jeremy-gilbert/forty-years-of-failure-how-to-challenge-narrative-of-hard-brexit
https://www.boe.es/boe/dias/2021/12/30/pdfs/BOE-A-2021-21788.pdf