1. Crash-Cad. Licensed by Impact Design Inc., Winchester, MA.
2. Wheeler MJ. Crashworthiness of aluminium structured vehicles. 98SAF042, ISATA Conference Proceedings, 1998, p. 151–60.
3. Thornton PH. Energy absorption by foam-filled structures. 8000081, Society of Automotive Engineers, Inc., 1981.
4. Lampinen BE, Jeryan RA. Effectiveness of polyurethane foam in energy absorbing structures. 820494, Society of Automotive Engineers, Inc., 1983.
5. Static and dynamic crushing of foam-filled sheet metal tubes;Reid;International Journal of Mechanical Sciences,1986