
http://www.elperiodico.com/es/politica/20171226/que-es-tabarnia-propuesta-secesion-barcelona-tarragona-resto-cataluna-6517873

https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-ongoing-police-and-judicial-cooperation-criminal-matters_en

https://www.opendemocracy.net/en/digitaliberties/is-the-internet-to-blame-for-the-rise-of-authoritarianism/