Carlos Slim

https://en.wikipedia.org/wiki/Carlos_Slim
http://www.carlosslim.com/responsabilidad_ing.html
http://www.forbes.com/profile/carlos-slim-helu/
http://www.investopedia.com/updates/carlos-slim-net-worth/
http://www.independent.co.uk/news/business/news/carlos-slim-mexico-three-day-work-week-six-hour-day-telmex-america-movil-productivity-a7173501.html
http://www.newyorker.com/magazine/2009/06/01/slims-time
http://www.nytimes.com/2016/08/10/world/americas/mexicos-carlos-slim-helu.html?_r=0
http://www.economist.com/node/21546028
https://www.theguardian.com/business/2015/dec/06/carlos-slim-biography-diego-enrique-osorno-interviews

http://www.forbes.com/sites/doliaestevez/2016/06/16/carlos-slims-foundation-launches-free-online-educational-app/#47a959395fea
http://fortune.com/2015/12/04/zuckerberg-carlos-slim/