
https://www.ipg-journal.de/rubriken/europaeische-integration/artikel/maechtig-maechtiger-eu-kommission-6567/

https://theconversation.com/la-crisis-de-venezuela-muestra-lo-dificil-que-es-garantizar-los-derechos-humanos-y-la-democracia-237008

http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6430&CESifoWP.search=+