
https://www.socialeurope.eu/2017/05/smooth-brexit-interests-germany-much-uk/

https://www.wilsoncenter.org/sites/default/files/media/uploads/documents/RAFDI_Working_Group_Report_0.pdf

http://www.guengl.eu/news/article/gue-ngl-news/adoption-of-the-european-travel-information-and-authorisation-system-a-hidd