North Korea?s Military Threat: Pyongyang?s Conventional Forces, Weapons of Mass Destruction, and Ballistic Missiles. Carlisle: US Army War College, Strategic Studies Institute, 2007.

Scobell, Andrew, and Brad Hammitt. "Goons, Gunmen, and Gendarmerie: Toward A Reconceptualization of Paramilitary Formations." Journal of Political and Military Sociology 26, no. 2 (1998): 213-27.