https://theconversation.com/idea-of-eu-citizenship-still-intangible-for-most-europeans-230994
https://cdn.ceps.eu/wp-content/uploads/2023/09/2023_17_Potential-Impact-of-Ukrainian-Accession-on-the-EUs-Budget.pdf
https://wiiw.ac.at/a-stronger-cee-for-a-stronger-europe-dlp-6916.pdf