https://theconversation.com/y-si-en-las-elecciones-generales-contaramos-los-votos-como-los-suecos-216234
https://www.ipg-journal.de/regionen/europa/artikel/detail/national-oekologisches-patchwork-3976/
https://www.parliament.uk/documents/commons-committees/culture-media-and-sport/Principles%20of%20the%20Law%20Governing%20the%20Internet.pdf