https://www.propublica.org/article/we-dont-talk-about-leonard-leo-supreme-court-supermajority
https://ec.europa.eu/commission/sites/beta-political/files/aviation.pdf
https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52019DC0278&from=EN
https://publications.parliament.uk/pa/ld5901/ldselect/ldfsrc/133/133.pdf