
http://ukandeu.ac.uk/wp-content/uploads/2018/10/The-mechanics-of-a-further-referendum-on-Brexit-Constitution-Unit-Report-1.pdf

https://www.politico.eu/article/eu-uk-relations-rishi-sunak-brexit/

https://www.euronews.com/2018/09/25/why-is-the-irish-border-issue-so-complex-euronews-answers