
http://ecdpm.org/wp-content/uploads/ETTG-Brief-Keijzer-Medinilla-November-2017.pdf

https://www.bakerinstitute.org/media/files/files/ac785a2b/BI-Brief-071817-CES_Russia1.pdf

https://ec.europa.eu/commission/sites/beta-political/files/security_defence_and_foreign_policy.pdf