http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52016DC0950&from=en
https://www.politico.eu/wp-content/uploads/2020/05/LetterVDL12052020EN.pdf
https://dam.gcsp.ch/files/doc/geneva-paper-34-24?_gl=1*1sbxhik*_ga*MjEwOTkyNTQ2My4xNzE0NTc4ODQ4*_ga_Z66DSTVXTJ*MTcxNDU3ODg0OC4xLjAuMTcxNDU3ODg0OC42MC4wLjA.
https://www.realclearworld.com/articles/2023/03/08/as_nato_grows_so_do_its_problems_886163.html?utm_source=newsletter&utm_medium=email&utm_campaign=09%2F03%2F2023%20%20