1. U.S. Civil rotorcraft accidents, 1963 through 1997;Harris,2000
2. Downey D, Rigsby M. Analysis of US civil helicopter accidents. Federal Aviation Administration, Heli-expo 2006 Safety Symposium, 2006.
3. Aircraft crash survival design guide. Volume 3. Aircraft structural crash resistance;Zimmerman,1989
4. Analysis of rotorcraft crash dynamics for development of improved crashworthiness design criteria;Coltman,1985
5. LS-DYNA/theory manual;Hallquist,2006