http://library.fes.de/pdf-files/bueros/rom/16042.pdf
http://www.europarl.europa.eu/ftu/pdf/en/FTU_5.9.1.pdf
http://policydialogue.org/files/publications/papers/Austerity-the-New-Normal-Ortiz-Cummins-6-Oct-2019.pdf
https://www.linkiesta.it/2020/05/macron-merkel-piano-iniziativa-500-miliardi/