https://www.secours-catholique.org/sites/scinternet/files/publications/rapport_revenusans_contreparties.pdf
http://www.oecd.org/std/Hows-Life-2017-60-second-guide.pdf
https://theconversation.com/varios-paises-de-america-latina-copian-el-modelo-bukele-para-combatir-a-las-bandas-criminales-229895