http://www.ng.ru/economics/2017-12-20/4_7140_rubl.html
https://www.inopressa.ru/article/20Dec2017/bloomberg/gazprom.html
Russia’s natural gas exporter is channeling more money into the fight for market share as the U.S. threatens its biggest European pipeline project with possible sanctions and delivers tankers of fuel to the region.
https://www.depo.ua/ukr/svit/dlya-chogo-putin-vlashtuye-rosiyanam-kontrolovaniy-haos-20171219696055
https://www.levada.ru/2017/12/18/otnoshenie-k-stranam-i-sanktsiyam/
https://www.gazeta.ru/politics/2017/12/18_a_11494580.shtml
http://www.ng.ru/world/2017-12-18/1_7138_bisnessmans.html
https://www.depo.ua/ukr/svit/dlya-chogo-u-ssha-gotuyut-tayemni-antirosiyski-sankciyi-20171218695664
http://www.kasparov.ru/material.php?id=5A3805841EC78