https://www.esri.ie/system/files/publications/SUSTAT118.pdf
https://reutersevents.com/events/reports/docs/magazine-september-2021.pdf
https://wiiw.ac.at/rrf-2-0-ein-permanenter-eu-investitionsfonds-im-kontext-von-energiekrise-klimawandel-und-eu-fiskalregeln-dlp-6413.pdf