https://www.kommersant.ru/doc/3814465
https://snob.ru/entry/168743?fbclid=IwAR1xbrqFpQY-rESrcKaLsCaFTj18Pm4qGPyC8IIY-7hBtnCV6aT1FJNOxqg
https://lenta.ru/articles/2018/11/28/fkthepolice/
https://www.inopressa.ru/article/26Nov2018/dailybeast/spy.html
https://www.kommersant.ru/doc/3804857
“Natural causes” can’t be ruled out. But those include stress, and there’s no doubt Gen. Korobov of the G(R)U was under a lot of that.
https://www.thedailybeast.com/inside-the-mystery-of-the-dead-russian-spy-chief
https://www.bbc.com/russian/features-46291929
https://www.gazeta.ru/politics/2018/11/23_a_12069265.shtml
https://day.kyiv.ua/ru/blog/politika/smert-glavy-razvedki-pochti-po-gogolyu