1. Metallic energy dissipating systems;Johnson;Appl. Mech. Rev.,1978
2. Plastic Methods of Structural Analysis;Neal,1970
3. Impact energy absorption using laterally compressed metal tubes;Reddy,1978
4. Theory of Elasticity;Timoshenko,1979
5. Plastic collapse of thin tubes;Hwang;J. Aero. Sci.,1953