https://ukandeu.ac.uk/the-swiss-approach-to-trade-with-the-eu/?mc_cid=f98b87bf43&mc_eid=815b1928ec
https://www.ceps.eu/wp-content/uploads/2013/02/1304.pdf
https://news.economiesuisse.ch/e/4f927f3c6102b2b8/nl/be1670358d5baafc939d524a/webversion/99eb2b6c427d84cd57951418b2ea143e45e209af/de.html
http://www.esf.be/new/wp-content/uploads/2018/07/ESF-Press-Release-on-Importance-of-Services-Trade-in-EU-UK-Future-Relastionship.pdf