https://wiiw.ac.at/a-stronger-cee-for-a-stronger-europe-dlp-6916.pdf
https://www.socialeurope.eu/2017/07/what-can-we-learn-from-the-nordic-model/
http://www.elperiodico.com/es/politica/20171226/que-es-tabarnia-propuesta-secesion-barcelona-tarragona-resto-cataluna-6517873
https://www.gmfus.org/sites/default/files/2024-07/070824%20-%20French%20Elections_0.pdf