http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52016DC0950&from=en
https://kyivindependent.com/carl-bildt-the-return-of-eu-enlargement/
https://www.lamoncloa.gob.es/consejodeministros/resumenes/Documents/2022/PAN%20202.pdf
https://www.ips-journal.eu/topics/european-integration/uniting-europes-distant-family-6734/