United States Code of Federal Regulations, Title 40: Protection of Environment, Part 86: Control of emissions from new and in-use highway vehicles and engines, 40 CFR86.I
United States Code of Federal Regulations, Title 40: Protection of Environment, Part 600: Fuel economy and greenhouse gas exhaust emissions of motor vehicles, 40 CFR600.I
John G. Kassakian; Hans Christoph Wolf; John M. Miller; Charles J. Hurton (August 1996). "Automotive Electrical Systems Circa 2005". IEEE Spectrum. Retrieved 24 April 2014.