
https://theconversation.com/europe-isnt-prepared-for-the-unmanned-aircraft-threat-will-its-drone-wall-be-enough-266761

https://europa.eu/globalstrategy/sites/globalstrategy/files/regions/files/eugs_review_web_0.pdf

https://www.ips-journal.eu/topics/democracy-and-society/between-human-rights-and-border-control-6860/