
https://www.bruegel.org/sites/default/files/2022-09/PC%2015%202022_0.pdf

https://www.ipg-journal.de/regionen/europa/artikel/detail/national-oekologisches-patchwork-3976/

http://www.britishelectionstudy.com/bes-findings/what-mattered-most-to-you-when-deciding-how-to-vote-in-the-eu-referendum/#.WWPVLnmQw2z