http://www.niesr.ac.uk/sites/default/files/publications/NIESR%20EU2%20MIGRATION%20REPORT.pdf
http://library.fes.de/pdf-files/id/ipa/13354.pdf
https://www.fragomen.com/file/scottishfuturespdf
http://www.radiofree.org/us/why-diemuk-shouldnt-take-a-precise-position-on-the-brexit-negotiations-or-why-britain-is-screwed/