http://www.nhsconfed.org/-/media/Confederation/Files/public-access/Securing-the-future.pdf?dl=1
http://ukandeu.ac.uk/wp-content/uploads/2018/10/The-mechanics-of-a-further-referendum-on-Brexit-Constitution-Unit-Report-1.pdf
https://www.project-syndicate.org/commentary/brexit-in-reverse-by-george-soros-2017-06?utm_source=Project+Syndicate+Newsletter&utm_campaign=2200ecc304-sunday_newsletter_25_6_2017&utm_medium=email&utm_term=0_73bad5b7d8-2200ecc304-105765449
https://hansard.parliament.uk/commons/2018-03-07/debates/65828E0C-3CC7-43AE-B5D2-B5F1B5D42A4C/EuropeanUnionCitizenship