U-14. “Lightweighting Materials FY 2009 Progress Report – Section G: Future Generation Passenger Compartment Phase 2 – Validation,” United States Department of Energy, page 50, https://www1.eere.energy.gov/vehiclesandfuels/pdfs/lm_09/5_automotive_metals-steel.pdf
U-13
U-14. “Lightweighting Materials FY 2009 Progress Report – Section G: Future Generation Passenger Compartment Phase 2 – Validation,” United States Department of Energy, page 50, https://www1.eere.energy.gov/vehiclesandfuels/pdfs/lm_09/5_automotive_metals-steel.pdf