https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_views-eu-27-v5_WEB.pdf
https://onlinelibrary.wiley.com/doi/10.1111/jcms.13415
https://bellacaledonia.org.uk/2021/09/24/the-flemish-the-outliers-of-europes-independence-movements/