https://www.socialeurope.eu/2017/07/imfs-approval-principle-greeces-third-program-depth-look/
https://ec.europa.eu/info/sites/info/files/economy-finance/ip127_en.pdf
http://www.bmwi.de/Redaktion/DE/Publikationen/Monatsbericht/schlaglichter-der-wirtschaftspolitik-05-2017.pdf?__blob=publicationFile&v=24
https://ukandeu.ac.uk/the-debt-brake-and-germanys-international-competitiveness/