https://institutdelors.eu/wp-content/uploads/2022/04/PB_220420_What-the-EU-budget-can-and-cannot-do-in-response-to-the-war-in-Ukraine_Rubio_EN.pdf
https://www.brookings.edu/blog/up-front/2023/01/25/how-worried-should-we-be-if-the-debt-ceiling-isnt-lifted/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=243260050&utm_source=hs_email
https://www.ecb.europa.eu/pub/pdf/other/ecb.escblegalconferenceproceedings201812.en.pdf