http://www.ng.ru/politics/2019-12-24/1_7760_main.html
https://www.rbc.ru/newspaper/2019/12/24/5e00aff99a794762cba94dec
https://www.kommersant.ru/doc/4205639
https://www.rbc.ru/newspaper/2019/12/24/5e00c0a29a79476c22d8272c
https://www.kp.ru/daily/27072/4142188/
https://newizv.ru/news/army/24-12-2019/rossiya-voshla-v-mirovoy-top-8-po-voennym-rashodam/rrr
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://theins.ru/opinions/194023
http://www.ng.ru/world/2019-12-23/6_7759_subbotin.html