http://www.europarl.europa.eu/ftu/pdf/en/FTU_5.9.1.pdf
https://static1.squarespace.com/static/5afc0bbbf79392ced8b73dbf/t/5b07d7ce1ae6cf2a4178f587/1527240672975/SGC_Full_Report.pdf
https://www.bloomberg.com/news/articles/2020-04-03/the-virus-will-force-europe-to-make-a-decision-about-italy?cmpid=BBD040320_CORONAVIRUS&utm_medium=email&utm_source=newsletter&utm_term=200403&utm_campaign=coronavirus
https://www.dbresearch.de/PROD/RPS_DE-PROD/PROD0000000000523908/Deutschland%3A_Konjunktur_kurzgefasst.PDF