
https://www.swp-berlin.org/publikation/majority-voting-on-foreign-policy-decisions-a-transitional-approach-needs-parliamentary-oversight

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

https://wiiw.ac.at/turkey-s-geo-economic-shift-an-opportunity-to-revitalise-eu-integration-amid-sanctions-dlp-7097.pdf