
https://www.etui.org/sites/default/files/2021-12/01-ETU%20BM2021-Small.pdf

http://www.bsa.natcen.ac.uk/latest-report/british-social-attitudes-34/key-findings/context.aspx?_ga=2.25464057.552181158.1498632950-1412959047.1496247036

https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1747en.pdf