https://theconversation.com/ampliacion-o-profundizacion-de-la-union-europea-227125
https://futurion.se/wp-content/uploads/2022/09/futurion-rapport-bortom-verklighetsbilden-2022-eng-rev-lowres.pdf
https://www.ifri.org/sites/default/files/atoms/files/pe-4-2022_mirel.pdf