https://www.ecb.europa.eu/press/key/date/2012/html/sp120726.en.html
https://www.bbc.com/news/world-europe-54964858
https://www.rtbf.be/info/monde/detail_la-taxe-tobin-doit-faire-partie-de-reformes-economiques-plus-larges-pour-charles-michel?id=9694965
http://www.globalbusinessoutlook.com/germanys-government-still-has-an-allergy-to-investing/