
https://blogs.lse.ac.uk/brexit/2019/03/14/the-eu-is-a-default-empire-of-nations-in-denial/

https://www.wilsoncenter.org/blog-post/helmut-kohl-collection-new-resource-post-cold-war-history

http://www.ebrd.com/cs/Satellite?c=Content&cid=1395272118012&d=&pagename=EBRD%2FContent%2FDownloadDocument