
https://documents1.worldbank.org/curated/en/099152301082423951/pdf/IDU10e3b5c3c1eb9214f981ad6116416052537cd.pdf

https://theconversation.com/tres-preguntas-fundamentales-para-saber-si-las-empresas-cumplen-su-proposito-224017

http://uk.reuters.com/article/uk-britain-eu-banking-idUKKBN17Q26A?il=0