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

https://institutdelors.eu/wp-content/uploads/2021/10/BP_211006_La-primaute-du-droit-de-lUnion-europeenne_Omnes.pdf

http://www.etui.org/Publications2/Books/Innovative-union-practices-in-Central-Eastern-Europe