https://www.nuffieldtrust.org.uk/files/2022-09/1662995727-nuffield-trust-new-horizons-web.pdf
https://www.inegalites.fr/Dans-les-pays-riches-les-10-les-plus-fortunes-detiennent-la-moitie-du
https://theconversation.com/por-que-escribimos-mexico-pero-decimos-mejico-la-relacion-de-la-grafia-x-con-la-pronunciacion-de-la-jota-217617