https://wiiw.ac.at/outlier-or-not-the-ukrainian-economy-s-preparedness-for-eu-accession-dlp-6704.pdf
https://www.bloomberg.com/news/articles/2017-06-14/ryanair-easyjet-say-soft-brexit-won-t-address-airline-concerns?cmpid=BBBXT061517_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170615&utm_campaign=brexit
https://theconversation.com/crisis-del-regimen-democratico-la-dominacion-de-los-partidos-politicos-en-espana-226276
https://www.lameduse.ch/2018/05/25/la-meduse-a-lu-affaire-gurtel-des-verdicts-qui-ebranlent-lespagne/