https://www.socialeurope.eu/2017/06/ten-thoughts-treaty-democratizing-euro-area-t-dem/
https://www.diw.de/documents/publikationen/73/diw_01.c.578096.de/18-7-3.pdf
https://www.cer.eu/sites/default/files/pbrief_recovery_fund_11.11.21.pdf
https://unctad.org/system/files/official-document/diaeiainf2021d1_en.pdf