http://norden.diva-portal.org/smash/get/diva2:1095959/FULLTEXT02.pdf
http://www.ips-journal.eu/regions/global/article/show/davos-2018-call-the-doctor-2544/
https://www.bbc.com/news/world-europe-54964858
https://www.economiesuisse.ch/de/print/pdf/node/48161