https://insightcrime.org/es/noticias/aciertos-retos-ambiciosa-politica-drogas-colombia/
http://ukandeu.ac.uk/wp-content/uploads/2018/10/The-mechanics-of-a-further-referendum-on-Brexit-Constitution-Unit-Report-1.pdf
https://www.socialeurope.eu/democracy-without-glue
https://theconversation.com/crisis-del-regimen-democratico-la-dominacion-de-los-partidos-politicos-en-espana-226276