https://www.ft.com/content/acb87ee2-2fba-11e9-ba00-0251022932c8
https://www.bbc.com/russian/news-47208981
https://www.gazeta.ru/business/2019/02/14/12183295.shtml?updated
https://www.gazeta.ru/politics/2019/02/13_a_12182467.shtml
https://www.gazeta.ru/business/2019/02/13/12182413.shtml
https://www.gazeta.ru/business/2019/02/14/12182839.shtml
https://www.gazeta.ru/politics/2019/02/14_a_12182935.shtml
https://www.gazeta.ru/army/2019/02/14/12183139.shtml
https://www.kommersant.ru/doc/3883551