1. Capital District Transportation Committee (CDTC). (2004). "New visions for capital district transportation: new visions 2025 amendment." Retrieved from http://www.cdtcmpo.org/rtp2025/2025.pdf (>February 2007)
2. Department of Transportation (DOT). (2006). "Strategic plan: 2006-2010." Retrieved from http://climate.volpe.dot.gov/plan/splan_2006.pdf (>February 2007)
3. Dolfman M. and Wasser S. (2004). "9/11 and the new york city economy: a borough-by-borough analysis." Retrieved from http://www.bls.gov/opub/mlr/2004/06/art1full.pdf (>February 2007)
4. Energy Information Agency (EIA). (2004). "Greenhouse gases climate change and energy." Retrieved from http://www.eia.doe.gov/oiaf/1605/ggccebro/chapter1.html (>February 2007)
5. Energy Information Agency (EIA). (2006). "Emissions of greenhouse gases in the united states 2005." Retrieved from http://www.eia.doe.gov/oiaf/1605/ggrpt/index.html (>February 2007)