https://www.bti-project.org/en/data/rankings/status-index/
https://www.opendemocracy.net/can-europe-make-it/ashoka-mody/german-social-democrats-have-alienated-their-base-and-fractured-europe?
https://www.opendemocracy.net/can-europe-make-it/andreas-rahmatian/eu-as-britain-s-constitutional-stabiliser?utm_source=Daily+Newsletter&utm_campaign=8d26251e8d-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-8d26251e8d-407405485
https://www.diw.de/documents/publikationen/73/diw_01.c.578096.de/18-7-3.pdf