https://institute.global/news/the-inbetweener-brexit
https://bdi.eu/media/pressecenter/#/artikel/news/brexit-wirft-seine-schatten-voraus/
http://blogactiv.eu/blog/2012/05/15/stumbling-towards-the-brexit/
https://www.ft.com/content/b638551a-68c3-11e7-8526-7b38dcaef614