
https://ecfr.eu/wp-content/uploads/How-to-prevent-Germany-from-becoming-Eurosceptic.pdf

http://www.css.ethz.ch/content/dam/ethz/special-interest/gess/cis/center-for-securities-studies/pdfs/ST2018.pdf

https://borderlex.net/2021/04/13/comment-quo-vadis-energy-charter-treaty/