
https://www.kyivpost.com/article/opinion/op-ed/steven-pifer-ukraine-and-nato-dont-ask-do.html

https://www.gmfus.org/sites/default/files/2021-09/Cristiani%20et%20al%20-%20report%20%281%29.pdf

http://www.realclearworld.com/articles/2017/04/17/a_us-uk_trade_agreement_and_the_trump_re-election_campaign_112297.html