Muhammad Ali Abir Z. Qamhiyah Donald R. Flugrad Mwafak M. Shakoor Theoretical and finite element study of a compact energy absorber. 95-106 2008 39 Advances in Engineering Software 2 http://dx.doi.org/10.1016/j.advengsoft.2006.12.006 db/journals/aes/aes39.html#AliQFS08