
https://www.bertelsmann-stiftung.de/en/publications/publication/did/social-justice-in-the-eu-index-report-2016/

https://www.ipsos.com/sites/default/files/ct/publication/documents/2019-01/ipsos_views_in_media_we_trust_web.pdf

http://oegfe.at/wordpress/2017/05/the-free-movement-of-workers-within-the-eu-and-the-case-of-austria-balancing-distortions-and-adding-value-op-ed-paul-schmidt-the-european-financial-review/