https://www.socialeurope.eu/2017/06/eu-fateful-year-2017/
https://www.socialeurope.eu/romania-and-bulgaria-stuck-in-eus-second-tier
https://blogs.lse.ac.uk/europpblog/2023/10/09/europes-xhiro/
http://www.elperiodico.com/es/politica/20171226/que-es-tabarnia-propuesta-secesion-barcelona-tarragona-resto-cataluna-6517873