http://www.rand.org/content/dam/rand/pubs/research_reports/RR1700/RR1786z1/RAND_RR1786z1.pdf
http://www.pircenter.org/en/news/6973-1224507
https://fpc.org.uk/wp-content/uploads/2020/12/Partnerships-for-the-future-of-UK-Foreign-Policy-FPC-publication-December-2020.pdf
https://theconversation.com/how-nato-summit-shows-europe-and-us-no-longer-have-a-common-enemy-259842