https://www.bruegel.org/analysis/defending-europe-without-us-first-estimates-what-needed
https://ec.europa.eu/commission/presscorner/detail/ov/SPEECH_20_1655
https://institutdelors.eu/wp-content/uploads/2021/10/BP_211006_La-primaute-du-droit-de-lUnion-europeenne_Omnes.pdf
https://pub.norden.org/nord2020-001/#