
https://blogs.lse.ac.uk/europpblog/2021/10/28/what-explains-the-fragmentation-of-the-german-party-system/

https://www.ips-journal.eu/topics/democracy-and-society/macrons-tightrope-walk-over-the-abyss-7604/

http://www.cer.org.uk/sites/default/files/insight_JS_9.5.17.pdf