https://ec.europa.eu/info/sites/info/files/annual-management-and-performance-report-2018.pdf
https://www.brookings.edu/blog/up-front/2018/07/12/as-trump-twists-natos-arm-lets-run-the-math-on-defense-spending/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=64421876
https://ukandeu.ac.uk/the-impact-of-brexit-on-bond-prices/?mc_cid=8002195303&mc_eid=815b1928ec
https://ec.europa.eu/info/sites/info/files/economy-finance/ip127_en.pdf