https://www.socialeurope.eu/poland-crossroads-authoritarianism-democracy
https://www.ippr.org/files/2018-03/cej-our-common-wealth-march2018.pdf
https://ec.europa.eu/research/evaluations/pdf/archive/other_reports_studies_and_documents/hlg_2017_report.pdf
https://blogs.lse.ac.uk/europpblog/2024/05/07/austria-the-2024-european-parliament-elections-a-prelude-to-this-years-legislative-elections/