
https://wiiw.ac.at/keeping-friends-closer-why-the-eu-should-address-new-geoeconomic-realities-and-get-its-neighbours-back-in-the-fold-dlp-6487.pdf

https://www.brookings.edu/articles/a-deterrence-response-monitoring-capability-for-the-us-department-of-defense/

http://HTTPS://WWW.WHITEHOUSE.GOV/WP-CONTENT/UPLOADS/2017/12/NSS-FINAL-12-18-2017-0905-2.PDF