위키백과, 우리 모두의 백과사전.
- The Revolution After Next: Making Vertical Envelopment by Operationally Significant Mobile Protected Forces a Reality in the First Decade of the 21st Century, Tedesco, Vincent J. III; Major, School of Advanced Military Studies , United States Army Command and General Staff College, Fort Leavenworth, United States, 2000, Page 15
- Iron Arm (book excerpt via Google Books), Sweet, John Joseph Timothy; Stackpole Books, 2007, Page 84)
- T-27 Tankette (from the 'battlefield.ru' website, with further references cited. Accessed 2008-02-21.)
- War Slang: American Fighting Words and Phrases Since the Civil War (book excerpt via Google Books), Dickson, Paul; Brassey's, 2004, Page 221)