1. Accessed on February 11, 2016 from http://qz.com/587520/russian-hackers-are-suspected-in-a-cyber-attack-that-caused-a-huge-blackout-in-ukraine/
2. Accessed on December 17, 2015 from http://www.nga.org/cms/about
3. Accessed on March 7, 2016 from http://www.techinsider.io/cyberattacks-2015-12
4. Accessed on March 7, 2016 from http://www.nytimes.com/interactive/2015/02/05/technology/recent-cyberattacks.html?_r=0
5. Blute, T. (2015). Enhancing the role of fusion centers in cybersecurity. Washington, D.C.