https://socialeurope.eu/the-left-must-embrace-fiscal-restructuring
https://www.imf.org/external/pubs/ft/fandd/2021/12/pdf/Kimball.pdf
https://wiiw.ac.at/rrf-2-0-ein-permanenter-eu-investitionsfonds-im-kontext-von-energiekrise-klimawandel-und-eu-fiskalregeln-dlp-6413.pdf
https://www.bruegel.org/wp-content/uploads/2021/05/PC-2021-11-ecofin-210521.pdf