
https://ec.europa.eu/commission/sites/beta-political/files/citizens-rights-essential-principles-draft-position-paper_en.pdf

http://blogs.lse.ac.uk/brexit/2017/05/31/eu-migrants-going-home-with-skills-acumen-and-higher-expectations/

http://www.niesr.ac.uk/sites/default/files/publications/NIESR%20EU2%20MIGRATION%20REPORT.pdf