https://www.ftm.eu/transparency-gap
https://www.cambridge.org/core/journals/government-and-opposition/article/partybased-sovereignism-in-eu-countries-main-patterns-and-their-justification/D0B84A3AEF9D4045BF4824B9353FEEAD
https://www.ispionline.it/it/pubblicazione/la-crisi-tedesca-e-il-futuro-dellindustria-europea-189853
http://www.assemblee-nationale.fr/15/propositions/pion0542.asp