http://blogs.lse.ac.uk/brexit/2017/08/22/what-does-respecting-the-referendum-result-mean/
https://www.esri.ie/system/files/publications/SUSTAT117.pdf
https://ec.europa.eu/commission/sites/beta-political/files/citizens-rights-essential-principles-draft-position-paper_en.pdf
https://ukandeu.ac.uk/northern-irelands-vicious-cycle-of-governance-failure/