
http://www.voxeurop.eu/en/2017/eu-uk-relations-5120821

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

http://www.independent.co.uk/news/uk/politics/article-127-brexit-stop-what-is-it-single-market-eu-eea-theresa-may-article-50-a7955806.html