https://rusi.org/sites/default/files/20200221_roberts_integrated_review.pdf
https://dserver.bundestag.de/btd/20/057/2005700.pdf
https://www.politico.eu/article/azerbaijan-advance-nagorno-karabakh-conflict-armenia-military-offensive/
https://carnegieendowment.org/2019/11/21/eu-defense-cooperation-progress-amid-transatlantic-concerns-pub-80381?utm_source=carnegieemail&utm_