
http://www.radiofree.org/us/why-diemuk-shouldnt-take-a-precise-position-on-the-brexit-negotiations-or-why-britain-is-screwed/

https://www.destatis.de/DE/PresseService/Presse/Pressemitteilungen/2017/08/PD17_261_12511pdf.pdf?__blob=publicationFile

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