https://www.gazeta.ru/business/2019/12/24/12881510.shtml
http://www.kasparov.ru/material.php?id=5E021FD1DF142
While sanctions will depress Russia's economic performance, they are unlikely to go to an extreme that causes its economic collapse.
SOFIA, Bulgaria -- The Russian assassin used an alias, Sergei Fedotov, and slipped into Bulgaria unnoticed, checking into a hotel in Sofia near the office of a local arms manufacturer who had been selling ammunition to Ukraine.He led a team of three men.Within days, one man sneaked into a locked parking
https://news.yahoo.com/poisoning-bulgaria-exposed-russian-assassins-133100185.html
https://www.radiosvoboda.org/a/news-us-taylor-russia-sanctions/30340526.html