http://www.rbc.ru/newspaper/2017/06/16/59429d019a79476202fd9b73
https://ru.krymr.com/a/28546736.html
https://ru.krymr.com/a/28546942.html
https://www.nytimes.com/2017/06/09/world/europe/aleksei-navalny-russia-election-putin.html?_r=0