http://www.bankofengland.co.uk/publications/Documents/speeches/2017/speech992.pdf
https://www.nabu.de/imperia/md/content/nabude/landwirtschaft/agrarreform/171121-executivesummary.pdf
http://openeurope.org.uk/today/blog/will-brexit-ground-flights-europe/
https://www.cfr.org/blog/power-and-financial-interdependence