https://www.socialeurope.eu/berlusconi-populist-pioneer-who-rode-italy-into-the-sand
http://blogs.lse.ac.uk/brexit/2017/07/19/euroscepticism-has-taken-hold-across-the-eu-but-it-has-many-different-roots/
https://www.consilium.europa.eu/media/ny3j24sm/much-more-than-a-market-report-by-enrico-letta.pdf