
https://www.cnil.fr/sites/default/files/atoms/files/cnil-38e_rapport_annuel_2017.pdf

https://theconversation.com/que-el-dia-tenga-24-horas-y-no-mas-ni-menos-lo-decidieron-los-antiguos-egipcios-209435

https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/366/366.pdf