http://www.assemblee-nationale.fr/14/pdf/rap-info/i4485.pdf
https://yougov.co.uk/news/2017/08/01/britain-nation-brexit-extremists/
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/682894/Draft_Text_for_Discussion_-_Implementation_Period__1_.pdf
http://www.standard.co.uk/news/politics/boris-johnson-backed-by-ukip-in-general-election-a3530371.html