http://www.britishelectionstudy.com/bes-findings/what-mattered-most-to-you-when-deciding-how-to-vote-in-the-eu-referendum/#.WWPVLnmQw2z
https://blogs.lse.ac.uk/brexit/2019/06/26/did-we-ever-really-understand-how-the-eu-works/
https://apps.eui.eu/EUI_API/EVENTSV2/Attachments/Index?id=22316