http://www.worldaffairsjournal.org/article/why-ukraines-success-pivotal
http://nv.ua/opinion/piontkovskiy/kakoe-predlozhenie-putin-sdelal-zapadu-48867.html
http://www.radiosvoboda.org/content/article/27018871.html
http://www.radiosvoboda.org/content/article/27017962.html
http://daily.com.ua/world/15-05-2015211005
http://argumenti.ru/politics/n487/399848