1. The Massive Cyberattack that Crippled the Internet
https://www.businessinsider.com.au/amazon-spotify-twitter-githuband-etsy-down-in-apparent-dns-attack-2016-10?r=US&IR=T
2. Virtual Machine Escape
https://en.wikipedia.org/wiki/Virtual_machine_escape
3. The 20 Coolest Cloud Security Vendors of the 2017 Cloud 100
https://www.crn.com/slide-shows/security/300083542/the-20-coolest-cloud-security-vendors-of-the-2017-cloud-100.htm
4. Malware Analysis via Hardware Virtualization Extensions
http://ether.gtisc.gatech.edu/
5. Zone-Based Policy Firewall Design and Application Guide,2010