https://www.kommersant.ru/doc/3502556
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://www.inopressa.ru/article/29Dec2017/dailybeast/kgb.html
http://www.kasparov.ru/material.php?id=5A4239226148D
https://lenta.ru/news/2017/12/29/inflation/
https://www.kommersant.ru/doc/3512393
https://www.kommersant.ru/doc/3512408