https://www.sipri.org/sites/default/files/European-Union-weapons-mass-destruction.pdf
https://ecfr.eu/wp-content/uploads/Ambiguous-alliance-Neutrality-opt-outs-and-European-defence.pdf
https://www.ips-journal.eu/topics/foreign-and-security-policy/a-bitter-battlefield-stalemate-6924/
https://www.opendemocracy.net/anthony-barnett/jeremy-corbyn-catches-spirit-of-brexit?utm_source=Daily+Newsletter&utm_campaign=e5551d75c4-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-e5551d75c4-407405485