
https://www.ips-journal.eu/topics/democracy-and-society/between-human-rights-and-border-control-6860/

https://www.greatbritishpolitics.co.uk/europe/654-dual-nationality-and-the-hurdles-facing-britons-who-want-to-keep-eu-citizenship-after-brexit.html

http://fedtrust.co.uk/views-from-the-federal-trust/free-movement-and-migration/