
https://theconversation.com/por-que-escribimos-mexico-pero-decimos-mejico-la-relacion-de-la-grafia-x-con-la-pronunciacion-de-la-jota-217617

http://library.fes.de/pdf-files/bueros/athen/13572.pdf

https://verfassungsblog.de/the-rise-and-fall-of-world-constitutionalism/