
https://www.ips-journal.eu/topics/foreign-and-security-policy/a-message-of-disunity-7363/

https://securityconference.org/assets/user_upload/MunichSecurityReport2020.pdf

https://theconversation.com/how-can-europe-meet-the-challenge-posed-by-the-retreat-of-the-us-274687