https://www.lse.ac.uk/european-institute/Assets/Documents/LEQS-Discussion-Papers/LEQSPaper169.pdf
https://www.aldeparty.eu/charanzov_the_single_market_is_still_not_complete?utm_campaign=alde_party_co_president_witnes&utm_medium=email&utm_source=aldeparty
https://www.ifri.org/fr/espace-media/lifri-medias/concept-de-souverainete-economique-industrielle-de-leurope-progressivement
http://www.ebrd.com/cs/Satellite?c=Content&cid=1395272118012&d=&pagename=EBRD%2FContent%2FDownloadDocument