https://focus.ua/country/388184/
https://www.gazeta.ru/comments/2017/12/28_a_11561696.shtml
A KGB manual showed how valuable—and how treacherous—Russian émigrés could be. Did KGB veteran Vladimir Putin learn those lessons?
https://www.thedailybeast.com/the-kgb-playbook-for-turning-russians-worldwide-into-agents
https://echo.msk.ru/programs/beseda/2119648-echo/
https://www.kommersant.ru/doc/3494223
https://www.inopressa.ru/article/29Dec2017/dailybeast/kgb.html
http://www.kasparov.ru/material.php?id=5A462801E9835
https://zn.ua/internal/ukraina-2018-doroga-mezhdu-vyzovami-i-riskami-no-doroga-270629_.html