https://blogs.lse.ac.uk/europpblog/2021/10/05/how-the-size-of-a-citys-immigrant-population-influences-feelings-of-trust-and-safety-in-urban-europe/
https://www.socialeurope.eu/2017/07/49234/
http://institute.global/sites/default/files/field_article_attached_file/IGC_EU%20Migration_10.09.17.pdf