https://www.socialeurope.eu/berlusconi-populist-pioneer-who-rode-italy-into-the-sand
https://theconversation.com/maduro-objetivo-silenciar-a-la-disidencia-228066
https://www.whitehouse.gov/wp-content/uploads/2018/10/The-Opportunity-Costs-of-Socialism.pdf
http://spinelligroup.eu/sites/spinelli/files/2018_manifesto_en.pdf