
https://blogs.lse.ac.uk/europpblog/2023/04/13/ever-closer-union-and-the-philosophical-history-of-europe/

https://theconversation.com/los-cuatro-desafios-de-una-legislatura-altamente-inflamable-en-espana-217758

https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/78/78.pdf