http://www.case-research.eu/files/?id_plik=5223
https://blogs.lse.ac.uk/europpblog/2022/08/17/threats-and-solidarity-in-the-eurozone-how-italian-and-german-citizens-respond-to-information-about-italexit/
https://www.sciencespo.fr/cevipof/sites/sciencespo.fr.cevipof/files/CEPR-DP13103.pdf
https://www.linkedin.com/pulse/addressing-vulnerability-cc-7-peter-atwater/?trk=portfolio_article-card_title