https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-governance_en
http://www.res.org.uk/view/art4Apr17Features.html
https://www.socialeurope.eu/2017/06/mercron-franco-german-tandem-back-berlins-terms/
https://ecipe.org/wp-content/uploads/2023/04/ECI_23_OccasionalPaper_02-2023_LY04.pdf?_gl=1*1wcezzg*_ga*Mjc5MzQwNDM3LjE2ODEzMTkyMzk.*_up*MQ..*_ga_T9CCK5HNCL*MTY4MTMxOTIzOS4xLjAuMTY4MTMxOTIzOS4wLjAuMA..