https://www.economiesuisse.ch/de/artikel/ohne-schuldenbremse-droht-die-schuldenspirale
https://www.piie.com/blogs/realtime-economics/if-markets-are-right-about-long-real-rates-public-debt-ratios-will
https://www.imk-boeckler.de/download-proxy-for-faust/download-pdf?url=http%3A%2F%2F217.89.182.78%3A451%2Fabfrage_digi.fau%2Fp_imk_report_152e_2020.pdf%3Fprj%3Dhbs-abfrage%26ab_dm%3D1%26ab_zeig%3D8849%26ab_diginr%3D8482
https://www.brookings.edu/articles/why-do-the-u-s-and-its-allies-want-to-seize-russian-reserves-to-aid-ukraine/