https://www.bruegel.org/sites/default/files/2022-09/PC%2015%202022_0.pdf
https://www.project-syndicate.org/commentary/trump-spurs-european-defense-integration-by-joseph-s–nye-2017-07
https://ukandeu.ac.uk/wp-content/uploads/2022/02/UKICE-British-Politics-after-Brexit.pdf