
https://ec.europa.eu/commission/publications/position-paper-essential-principles-financial-settlement_en

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

http://blogs.lse.ac.uk/brexit/2018/01/12/the-usual-underdogs-of-lobbying-were-the-surprising-winners-of-the-brexit-vote-debate/