https://ukandeu.ac.uk/wp-content/uploads/2021/11/Brexit-and-Services-Trade-Working-Paper.pdf
https://www.elysee.fr/admin/upload/default/0001/11/8143fbb609fe8fa002cd7a36deccc1a219766cda.pdf
http://www.ecfr.eu/article/commentary_the_brexit_threat_to_britains_defence_industry
https://ec.europa.eu/commission/presscorner/api/files/document/print/en/ip_23_4348/IP_23_4348_EN.pdf