
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18032en.pdf

https://www.opendemocracy.net/can-europe-make-it/kieran-oberman/does-catalonia-have-right-to-secede?utm_source=Daily+Newsletter&utm_campaign=9960ef2d4f-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-9960ef2d4f-407405485

https://carnegieeurope.eu/2019/06/05/is-german-democracy-back-to-normal-pub-79252?utm_source=carnegieemail&utm_medium=email&utm_campaign=announcement&mkt_tok=eyJpIjoiTmpnNE5XUmtOekJoTkRrdyIsInQiOiJFVWFZakVXU0VkUFNWXC9IYVdQZXJLNTlJNnFjeDFmSzl2QVh0dGFGd2l6NkQyeHlpM0lNYW80RGVUcHhKZzZjZ200WnZXcllVNDFXUEJ3SmdOb3NOZTRGblNZQjZSbUp4bU5cLzNHMWh2dWZpZG9leWI2TTJRUktBeHAzVmp1TnpYIn0%3D