https://academic.oup.com/ia/article/99/1/219/6967342?login=false
https://www.bertelsmann-stiftung.de/en/publications/publication/did/social-justice-in-the-eu-index-report-2016/
http://www.pewglobal.org/2017/06/15/post-brexit-europeans-more-favorable-toward-eu/?cmpid=BBBXT061617_BIZ&utm_medium=email&utm_source=newsletter&utm
https://theconversation.com/la-crisis-de-venezuela-muestra-lo-dificil-que-es-garantizar-los-derechos-humanos-y-la-democracia-237008