https://wiiw.ac.at/outlier-or-not-the-ukrainian-economy-s-preparedness-for-eu-accession-dlp-6704.pdf
http://www.ebrd.com/cs/Satellite?c=Content&cid=1395272118012&d=&pagename=EBRD%2FContent%2FDownloadDocument
http://www.britishelectionstudy.com/bes-findings/what-mattered-most-to-you-when-deciding-how-to-vote-in-the-eu-referendum/#.WWPVLnmQw2z