https://www.gmfus.org/sites/default/files/2022-02/Keil%20-%20NATO%20core%20tasks%20-%20brief%20NEW.pdf
https://theconversation.com/la-anomalia-empirica-de-las-elecciones-en-argentina-donde-dos-mas-dos-no-suman-cuatro-217319
http://www.lecese.fr/sites/default/files/pdf/Avis/2018/2018_16_raef_2018.pdf