1. Hill K, Menk D and Cooper A: ‘Contribution of the automotive industry to the economics of all fifty states and the United States’, Research Paper by Center for Automotive Research (CAR), Ann Arbor, Michigan, April 2010.
2. Regulation (EC) No 443/2009 of the European Parliament and of the Council, April 2009.
3. Ashby AF: ‘Materials selection in mechanical design, 3rd edn, 2005, Oxford, Butterworth-Heinemann.