https://www.kommersant.ru/doc/3494879
Western leaders gave multiple assurances against NATO expansion to Gorbachev in 1990-1991 according to declassified American, Russian, British, Germans documents
https://www.radiosvoboda.org/a/news/28911740.html
http://www.kasparov.ru/material.php?id=5A2F7E0E514BC
Russia has never truly reckoned with the horrors of Stalin’s regime. And now the Kremlin is keener than ever to avoid acknowledging past crimes; instead, it is promoting an authoritarian ideology dangerously reminiscent of Stalin’s own.
https://www.foreignaffairs.com/articles/russian-federation/2017-12-12/dont-speak-memory
https://www.kommersant.ru/doc/3494191
https://www.kommersant.ru/doc/3486803
http://www.kasparov.ru/material.php?id=5A2D426037321
http://www.ng.ru/ideas/2017-12-11/5_7134_vavilon.html