Sang-Hun, Choe. "Computer Networks in South Korea Are Paralyzed in Cyberattacks." New York Times [online edition]. http://www.nytimes.com (20 March 2013).

Sang-Hun, Choe. "Computer Networks in South Korea Are Paralyzed in Cyberattacks." New York Times [online edition]. http://www.nytimes.com (20 March 2013).