https://theconversation.com/el-espanol-una-lengua-americana-228150
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/fs-livret-seminaire-soutenabilite-covid-19-mai-2020.pdf
http://www.europarl.europa.eu/cmsdata/136000/Report_Joint%20LIBE-PANA%20Mission%20to%20Malta.pdf
https://www.imperial.ac.uk/media/imperial-college/medicine/sph/ide/gida-fellowships/Imperial-College-COVID19-NPI-modelling-16-03-2020.pdf