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

http://www.progressives-zentrum.org/wp-content/uploads/2018/03/The-Future-of-the-Visegrad-Group_2018_ebook.pdf

https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_views-eu-27-v5_WEB.pdf