http://www.radiofree.org/us/why-diemuk-shouldnt-take-a-precise-position-on-the-brexit-negotiations-or-why-britain-is-screwed/
https://www.economiesuisse.ch/de/artikel/kuendigungsinitiative-ii-eine-wohlstandsbremse-par-excellence
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmexeu/1125/1125.pdf