U.S. sanctions have driven the price of oil and the ruble apart—leaving Russia with expensive crude and a cheaper currency, a combination that is helping its economy.
https://www.kommersant.ru/doc/3772350
https://www.kommersant.ru/doc/3771740
https://www.rbc.ru/newspaper/2018/10/16/5bc4a38f9a794798669c5ec3
https://www.kommersant.ru/doc/3771416
https://www.kommersant.ru/doc/3771146
https://www.rbc.ru/newspaper/2018/10/15/5bbf282f9a7947f6f7f5b514
https://www.gazeta.ru/politics/2018/10/15_a_12021793.shtml