
https://trybunal.gov.pl/en/hearings/judgments/art/11662-ocena-zgodnosci-z-konstytucja-rp-wybranych-przepisow-traktatu-o-unii-europejskiej

https://www.global-counsel.co.uk/sites/default/files/analysis/insight/download/Hard%20and%20Soft%20Political%20Risk.pdf

https://theconversation.com/renuncia-o-reafirmacion-pedro-sanchez-detiene-su-agenda-mientras-espana-esta-en-vilo-228721