http://www.ng.ru/politics/2017-12-22/3_7142_migrants.html
After the deal with OPEC, Russia’s energy minister is now as closely watched as his Saudi counterpart
https://www.bloomberg.com/news/articles/2017-12-20/putin-s-mr-opec-becomes-an-oil-market-player
https://www.inopressa.ru/article/20Dec2017/bloomberg/novak.html
https://www.gazeta.ru/science/2017/12/13_a_11433254.shtml
https://www.kommersant.ru/doc/3494191
http://www.kasparov.ru/material.php?id=5A2469B020A4E
http://www.rosbalt.ru/russia/2017/12/01/1664650.html
https://www.kommersant.ru/doc/3480571
http://www.ng.ru/politics/2017-11-27/1_7123_deportation.html