https://www.ecb.europa.eu/press/key/date/2017/html/ecb.sp170524.en.html
https://ec.europa.eu/commission/sites/beta-political/files/reflection-paper-emu_en.pdf
https://www.socialeurope.eu/eu-enlargement-prospects-and-challenges
https://commission.europa.eu/document/download/ec1409c1-d4b4-4882-8bdd-3519f86bbb92_en?filename=The%20future%20of%20European%20competitiveness_%20In-depth%20analysis%20and%20recommendations_0.pdf