https://www.brookings.edu/wp-content/uploads/2022/03/Illicit-purchases-of-US-property.pdf
https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52022PC0457&from=EN
http://www.bertelsmann-stiftung.de/fileadmin/files/Projekte/Migration_fair_gestalten/IB_PolicyBrief_Einwanderungsgesetz_082017_ENG.pdf
https://www.eppo.europa.eu/sites/default/files/2023-02/EPPO_2022_Annual_Report_EN_WEB.pdf