https://www.inopressa.ru/article/13Nov2019/time/14.html
Heidi Blake's new book reveals why the U.K. was so reluctant to investigate 14 Kremlin-linked assassinations on its own soil.
https://time.com/5725041/uk-russian-assassins-heidi-blake/
http://www.kasparov.ru/material.php?id=5DCADD6535D42
https://www.mk.ru/politics/2019/11/07/rossiya-zhertva-politicheskogo-ubiystva.html
https://lenta.ru/articles/2019/10/29/tatarsky2/
http://www.kasparov.ru/material.php?id=5DB3085CE7C10