https://www.rbc.ru/newspaper/2018/12/10/5c0a22b29a7947ad05b83d95
http://www.kasparov.ru/material.php?id=5C0C50F5C17AF
http://www.ng.ru/politics/2018-12-09/1_7458_liberaly.html
Kremlinologists took note when Katerina Tikhonova, who has been widely reported to be President Vladimir V. Putin’s daughter, appeared on television.
https://www.nytimes.com/2018/12/08/world/europe/putin-daughter.html
https://www.gazeta.ru/politics/2018/12/08_a_12087715.shtml
https://www.segodnya.ua/politics/bolshaya-druzhba-s-rossiey-nekrolog-1195768.html
https://www.kommersant.ru/doc/3821804