https://freedomhouse.org/sites/default/files/2020-04/05062020_FH_NIT2020_vfinal.pdf
https://theconversation.com/los-cuatro-desafios-de-una-legislatura-altamente-inflamable-en-espana-217758
https://www.lameduse.ch/2018/05/25/la-meduse-a-lu-affaire-gurtel-des-verdicts-qui-ebranlent-lespagne/
https://www.socialeurope.eu/wp-content/uploads/2018/12/SD_ProgressiveSociety-SustainableEquality.pdf