https://www.venice.coe.int/webforms/documents/default.aspx?pdffile=CDL-REF(2024)002-e
https://blogs.lse.ac.uk/europpblog/2021/10/28/what-explains-the-fragmentation-of-the-german-party-system/
https://theconversation.com/el-auge-de-las-derechas-elecciones-europeas-y-cambio-de-paradigma-227659