https://www.consilium.europa.eu/media/45109/210720-euco-final-conclusions-en.pdf
https://www.lse.ac.uk/ideas/Assets/Documents/reports/LSE-IDEAS-The-Rise-of-Insurgent-Europeanism.pdf
https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-governance_en
http://www.levyinstitute.org/pubs/wp_886.pdf