https://carnegieendowment.org/files/2-24_Lehne-EU_Geopolitics.pdf
http://www.votewatch.eu/blog/alliances-matter-political-networks-the-rule-of-law-principles-and-the-split-of-eu-money-mff/
https://www.socialeurope.eu/spo-how-not-to-run-a-leadership-contest
UKIN-State-of-the-EU-Report-1.pdf (ukandeu.ac.uk)