https://www.socialeurope.eu/backsliding-in-belgrade-serbias-european-future
https://theconversation.com/idea-of-eu-citizenship-still-intangible-for-most-europeans-230994
https://theconversation.com/is-macron-pushing-france-toward-a-strange-defeat-233011
https://www.socialeurope.eu/wp-content/uploads/2019/09/Occ-Pap-14.pdf