
https://www.whitehouse.gov/wp-content/uploads/2018/10/The-Opportunity-Costs-of-Socialism.pdf

https://www.berliner-zeitung.de/mensch-metropole/bundestagsabgeordnete-noch-immer-keine-transparenz-ueber-nebenjobs-li.261569

https://theconversation.com/por-que-las-protestas-masivas-contra-el-chavismo-son-esta-vez-mas-relevantes-que-nunca-236063