https://www.golem.de/news/snet-in-kuba-ein-internet-mit-billigroutern-und-ohne-porno-1801-131945.html
https://www.wired.com/2017/07/inside-cubas-diy-internet-revolution/
https://gizmodo.com/cubas-illegal-underground-internet-is-thriving-1681797114
https://conferences.sigcomm.org/imc/2017/papers/imc17-final186.pdf