
http://www.independent.co.uk/news/uk/politics/article-127-brexit-stop-what-is-it-single-market-eu-eea-theresa-may-article-50-a7955806.html

https://publications.parliament.uk/pa/cm201719/cmselect/cmworpen/769/769.pdf

https://theconversation.com/la-paradoja-de-la-abundancia-como-se-explica-que-un-pais-rico-en-recursos-no-genere-crecimiento-economico-207778