
https://ec.europa.eu/commission/publications/position-paper-essential-principles-citizens-rights_en

http://blogs.lse.ac.uk/brexit/2017/09/05/warning-the-cost-of-brexit-could-seriously-damage-your-health-service/

https://blogs.sussex.ac.uk/uktpo/2018/12/17/organising-the-second-referendum/