https://www.boeckler.de/pdf/p_imk_report_139_2018.pdf
https://www.economiesuisse.ch/de/artikel/gut-so-trotz-zinspause-wird-die-geldpolitik-straffer
http://www.resolutionfoundation.org/app/uploads/2017/01/Audit-2017.pdf
https://committees.parliament.uk/publications/23257/documents/169721/default/