http://www.ecfr.eu/article/commentary_there_is_life_for_the_eu_after_brexit
https://www.aspistrategist.org.au/is-the-europen-union-too-big-for-further-enlargement/
https://www.gov.uk/government/news/david-davis-speech-at-ubs
https://www.ifri.org/sites/default/files/atoms/files/ifri_holzhauser_alliance_bsw_2024.pdf