https://ec.europa.eu/commission/sites/beta-political/files/seminar-20200114-lpf_en.pdf
https://pub.norden.org/nord2020-001/#
https://www.bloomberg.com/news/articles/2017-06-15/eu-citizens-want-a-brexit-style-vote-to-say-yes-to-staying?cmpid=BBBXT061617_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170616&utm_campaign=brexit
https://blogs.lse.ac.uk/europpblog/2023/12/11/new-hopes-for-the-eu-enlargement-process/