
https://www.sciencespo.fr/cevipof/sites/sciencespo.fr.cevipof/files/CEPR-DP13103.pdf

https://ukandeu.ac.uk/explainers/the-uk-covid-19-inquiry/

https://theconversation.com/la-anomalia-empirica-de-las-elecciones-en-argentina-donde-dos-mas-dos-no-suman-cuatro-217319