https://www.economiesuisse.ch/de/print/pdf/node/48305
https://economy-finance.ec.europa.eu/document/download/f5827354-8501-49cb-bf2d-13f2f7a9444f_en?filename=dp199_en.pdf
https://www.bloomberg.com/opinion/articles/2020-02-11/euro-s-decline-reflects-political-turmoil-economic-woes?cmpid=BBBXT021120_BIZ&utm_medium=email&utm_source=newsletter&utm_term=200211&utm_campaign=brexit
http://www.oecd-ilibrary.org/docserver/download/5jlv2jhfnt48-en.pdf?expires=1494939516&id=id&accname=guest&checksum=08592067325A17BFB82AC6F6E15110B2