https://www.socialeurope.eu/spo-how-not-to-run-a-leadership-contest
http://www.elysee.fr/chronologie/#e17364,2017-09-26,discours-sur-l-europe-grand-amphith-tre-de-la-sorbonne-2
https://www.instituteforgovernment.org.uk/sites/default/files/publications/5890%20IFG%20-%20Whitehall%20Monitor%202018%20web.pdf