
https://www.eca.europa.eu/Lists/ECADocuments/SR21_08/SR_Frontex_EN.pdf

https://rusi.org/explore-our-research/publications/commentary/giving-raf-typhoons-ukraine-would-be-very-expensive-symbolic-gesture

https://www.socialeurope.eu/europes-defence-crisis-why-more-spending-alone-will-not-keep-the-continent-safe