https://focus.ua/country/388184/
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.kommersant.ru/doc/3494223
http://intersectionproject.eu/ru/article/russia-europe/kak-vengriya-vybiraet-s-kem-druzhit
https://www.inopressa.ru/article/29Dec2017/dailybeast/kgb.html
https://www.kommersant.ru/doc/3512369
https://www.kommersant.ru/doc/3494224
https://www.kommersant.ru/doc/3512389
https://ru.krymr.com/a/28944363.html