http://ecdpm.org/wp-content/uploads/ETTG-Brief-Keijzer-Medinilla-November-2017.pdf
https://bti-project.org/en/reports/country-report/MLI
https://www.socialeurope.eu/ukraine-putins-reality-and-the-real-world
https://theconversation.com/la-anomalia-empirica-de-las-elecciones-en-argentina-donde-dos-mas-dos-no-suman-cuatro-217319