
https://www.openglobalrights.org/we-need-privacy-and-data-laws-to-tackle-this-world-pandemic/?lang=Spanish

http://www.ips-journal.eu/regions/europe/article/show/the-topsy-turvy-election-pollsters-failed-to-predict-2096/

https://publications.parliament.uk/pa/ld201719/ldselect/ldppdm/106/106.pdf