1. Advanced Persistent Threat (APT) Groups & Threat Actors;Mandiant,2023
2. The Big Four and Cyber Espionage: How China, Russia, Iran and North Korea Spy Online;Diotte,2020
3. Managing information security risk :
4. Making Order out of Chaos: How to Deal with Threat Group Names — STAR Webcast;Nickels,2023
5. Groups — MITRE ATT&CK®,2023