https://wiiw.ac.at/alternatives-in-the-design-of-sovereign-green-bonds-dlp-6412.pdf
https://ec.europa.eu/commission/sites/beta-political/files/globalisation-adjustment-fund-factsheet_en.pdf
http://library.fes.de/pdf-files/bueros/rom/16042.pdf
https://ukandeu.ac.uk/the-debt-brake-and-germanys-international-competitiveness/