https://www.kommersant.ru/doc/3410422
https://www.inopressa.ru/article/15Sep2017/wp/putin.html
https://ru.krymr.com/a/28738121.html
https://ru.krymr.com/a/28736835.html
Vladimir Putin has spent more time in Russia's top office than Leonid Brezhnev.
https://www.radiosvoboda.org/a/news/28734930.html
https://www.gazeta.ru/science/2017/09/14_a_10888262.shtml
https://www.kommersant.ru/doc/3409875
https://www.levada.ru/2017/09/13/16612/
https://7days.us/stanislav-kucer-vybor-pridetsa-sdelat-kazdomu