http://zn.ua/POLITICS/pozor-vsemu-zapadu-za-to-chto-my-podveli-ukraincev-makkeyn-167435_.html
http://www.bloombergview.com/articles/2015-02-18/putin-s-staying-put-for-now-
http://foreignpolicy.com/2015/02/17/what-putin-learned-from-reagan-ukraine-nicaragua/
http://www.wsj.com/articles/ukraine-troops-begin-pullback-from-debaltseve-lawmaker-says-1424250264