1. Ezra AA, Fay RJ. An assessment of energy absorbing devices for prospective use in aircraft impact situations. In: Herrmann G, Perrone N, editors. Dynamic response of structures. Oxford: Pergamon Press, 1972:225–46.
2. Metallic energy dissipating systems;Johnson;Appl Mech Rev,1978
3. Transverse collapse of thin-walled square tubes in opposed loadings;Gupta;Thin-Wall Struct,1990
4. Collapse of a laterally compressed square tube resting on a flat base;Gupta;Int J Sol Struct,1990
5. Lateral compression of cross layers of square section tubes;Gupta;Int J Mech Sci,1990