
http://www.pewresearch.org/fact-tank/2017/06/26/around-the-world-favorability-of-u-s-and-confidence-in-its-president-decline/

https://www.ipg-journal.de/rubriken/europaeische-integration/artikel/maechtig-maechtiger-eu-kommission-6567/

https://www.parliament.uk/documents/commons-committees/culture-media-and-sport/Chris%20Wylie%20Background%20papers.pdf