http://www.rosbalt.ru/russia/2019/04/18/1776826.html
https://www.kommersant.ru/doc/3946886
Russia is eyeing the development of vast oil and gas resources locked beneath the Arctic Circle. The costly initiative is part of the Kremlin's plan to establish and control a North Sea Route (NSR) connecting shipping lanes between Europe and the Far East.
https://www.gazeta.ru/business/2019/04/16/12304711.shtml
https://www.rbc.ru/newspaper/2019/04/16/5cb466369a7947189cf7f4a4
http://expert.ru/2019/04/16/tsb-sanktsii/
https://www.svoboda.org/a/29879125.html
http://www.kasparov.ru/material.php?id=5CB4A54065757
http://www.ng.ru/economics/2019-04-15/1_7557_price.html