https://ru.krymr.com/a/29258852.html
http://www.dsnews.ua/economics/sanktsii-po-ukrainski-kak-ukraine-napugat-putina-29052018220000
https://www.radiosvoboda.org/a/29257546.html
https://ru.krymr.com/a/29255011.html
https://ru.krymr.com/a/29255128.html
https://carnegie.ru/commentary/76455
http://www.ng.ru/courier/2018-05-28/9_7233_mission.html
https://www.gazeta.ru/politics/2018/05/27_a_11767117.shtml
https://www.svoboda.org/a/29253400.html
https://www.svoboda.org/a/29253351.html