https://www.bti-project.org/en/data/rankings/status-index/
https://ec.europa.eu/commission/presscorner/api/files/document/print/en/speech_21_4701/SPEECH_21_4701_EN.pdf
https://www.socialeurope.eu/poland-crossroads-authoritarianism-democracy
https://theconversation.com/ampliacion-o-profundizacion-de-la-union-europea-227125