https://yougov.co.uk/news/2017/08/01/britain-nation-brexit-extremists/
http://www.ecfr.eu/page/-/Keeping_Europe_Safe_After_Brexit2.pdf
https://bdi.eu/#/artikel/news/europa-muss-ein-worst-case-szenario-verhindern/
http://cdn.budgetresponsibility.org.uk/July_2017_Fiscal_risks.pdf