https://focus.ua/country/356682/
http://www.svoboda.org/a/27972022.html
http://ukrainian.voanews.com/a/novi-sanktsii-proty-rosiyi/3497486.html
https://www.stratfor.com/analysis/putins-iron-grip-forged-fires-terrorism
https://www.ft.com/content/cdd65dc0-7440-11e6-bf48-b372cdb1043a
http://www.ponarseurasia.org/ru/article_20160906_Petrov
http://ru.krymr.com/a/27970908.html
http://www.depo.ua/ukr/svit/chomu-derzhdep-ne-vdariv-po-gazpromu-v-povnu-silu-07092016140000