https://www.dw.com/en/brexit-german-leaders-write-emotional-letter-to-britain/a-47132376
https://ec.europa.eu/commission/sites/beta-political/files/position-paper-public-procurement_en.pdf
http://www.assemblee-nationale.fr/14/pdf/rap-info/i4485.pdf
http://fedtrust.co.uk/the-2017-general-election-a-mandate-for-brexit/