
https://www.boeckler.de/data/downloads/IMK/FMM%20Konferenz%202023/v_2023_10_20_goekten.pdf

https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/fs-2019-na83-gains-monetaires-decembre.pdf

https://blogs.lse.ac.uk/europpblog/2021/07/23/same-legal-status-but-unequal-treatment-bureaucratic-discrimination-against-mobile-eu-citizens/