
http://wir2018.wid.world/files/download/wir2018-summary-german.pdf

http://www.europarl.europa.eu/RegData/etudes/etudes/join/2013/493010/IPOL-FEMM_ET(2013)493010_EN.pdf?utm_source=POLITICO.EU

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