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https://www.project-syndicate.org/commentary/german-constitutional-court-ecb-ruling-may-threaten-euro-by-katharina-pistor-2020-05

http://institutdelors.eu/wp-content/uploads/2018/03/Quelleambitionpourlautorit%C3%A9europ%C3%A9ennedutravail-Fernandes-mars18.pdf