https://www.socialeurope.eu/2017/05/smooth-brexit-interests-germany-much-uk/
https://www.ips-journal.eu/topics/democracy-and-society/between-human-rights-and-border-control-6860/
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/766465/The-UKs-future-skills-based-immigration-system-print-ready.pdf
https://cdn.tspace.gov.au/uploads/sites/107/2018/04/Shaping-a-Nation-1.pdf