https://www.sussex.ac.uk/webteam/gateway/file.php?name=briefing-paper-1.pdf&site=18
https://www.piie.com/sites/default/files/2023-04/pb23-3.pdf
http://www.cer.eu/sites/default/files/bulletin_118_js-sl_article2.pdf
https://www.nybooks.com/articles/2022/04/07/the-last-of-her-kind-chancellor-angela-merkel-marton/