https://www.fireeye.com/blog/threat-research/2021/04/espionage-group-unc1151-likely-conducts-ghostwriter-influence-activity.html

https://www.fireeye.com/blog/threat-research/2020/07/ghostwriter-influence-campaign.html

https://www.tagesschau.de/investigativ/wdr/hackerangriffe-105.html

https://content.fireeye.com/web-assets/rpt-unc1151-ghostwriter-update