1. Military standard for light fixed and rotary-wing aircraft crash resistance,1988
2. FAA 14 CFR airworthiness standards: Part 23 normal, utility, acrobatic and commuter category airplanes, Part 25 transport category airplanes, Part 27 normal category rotorcraft, Part 29 transport category rotorcraft, Federal Aviation Administration, www.airweb.faa.gov.
3. EASA certification specifications: CS 23 normal, utility, aerobatic and commuter aeroplanes, CS 25 large aeroplanes, CS 27 small rotorcraft, CS 29 large rotorcraft, European Aviation Safety Agency, www.easa.europa.eu.
4. Progressive crushing of fibre-reinforced composite structural components of a formula one racing car;Bisagni;Compos Struct,2005