
https://www.oecd-ilibrary.org/docserver/9789264293083-en.pdf?expires=1529901663&id=id&accname=guest&checksum=4A5E0B0C79A72EF7A887DDB0119B4594

https://economiesuisse.ch/sites/default/files/publications/swisscode_e_web_0.pdf

https://www.nao.org.uk/wp-content/uploads/2022/05/Regulating-after-EU-Exit.pdf