https://www.consilium.europa.eu/en/meetings/international-summit/2021/10/06/
https://www.feps-europe.eu/attachments/publications/our_european_future_ipdf%201.pdf
https://ec.europa.eu/info/departments_en
http://www.elperiodico.com/es/politica/20171226/que-es-tabarnia-propuesta-secesion-barcelona-tarragona-resto-cataluna-6517873