http://www.etui.org/Publications2/Books/Innovative-union-practices-in-Central-Eastern-Europe
https://www.telesurenglish.net/news/EU-Court-Withdraws-Parliamentary-Immunity-From-Catalan-Leaders-20230705-0012.html
https://assets.ctfassets.net/rdwvqctnt75b/7iQEHtrkIbLcrUkduGmo9b/cb429a657e97cad61e61853c05c8c4d1/Hansard-Society__Audit-of-Political-Engagement-16__2019-report.pdf
https://centreonconstitutionalchange.ac.uk/sites/default/files/2021-04/Union%20at%20the%20Crossroads.pdf