1. Research and Innovative Technology Administration;United States Department of Transportation,2009
2. Diesel Particulate Matter Exposure Assessment Study for the Ports of Los Angeles and Long Beach;California Air Resources Board,2006
3. Health Risk Assessment for the BNSF Railway San Bernardino Railyard;California Air Resources Board,2008
4. Technical Highlights: Emissions Factors for Locomotives;Environmental Protection Agency,2009
5. Transportation Energy Data Book;Davis,2007