https://theconversation.com/idea-of-eu-citizenship-still-intangible-for-most-europeans-230994
https://jaarverslag.raadvanstate.nl/in-de-staat/onverwachte-wendingen/
https://www.ips-journal.eu/index.php?id=340&L=0&tx_news_pi1[news]=3990&tx_news_pi1[controller]=News&tx_news_pi1[action]=detail&utm_source=newsletter&utm_medium=email&utm_campaign=en_740_20200110&cHash=4085e7e6991bfdb39fee2e9dc7740fc0
https://ukandeu.ac.uk/explainers/the-european-political-community/