1. Alternative Fuels Data Center (AFDC) (2011) Alternative fueling station total counts by state and fuel type. Alternative Fuels & Advanced Vehicles Data Center in the U.S. DOE. Retrieved 20 Apr 2011. Available at
http://www.afdc.energy.gov/afdc/fuels/stations_counts.html
2. American Chemistry Council (2011) Shale gas and new petrochemicals investment: benefits for the economy, jobs, and U.S. manufacturing. American Chemistry Council, Economics and Statistics Department, Washington, DC
3. American Chemistry Council (2012) Shale gas, competitiveness and new U.S. investment: a case study of eight manufacturing industries. American Chemistry Council, Economics and Statistics Department, Washington, DC
4. American Chemistry Council (2014) U.S. chemical investment linked to shale gas reaches $100 Billion. American Chemistry Council, Economics and Statistics Department, Washington, DC
5. Bryce R (2011) Ten reasons why natural gas will fuel the future. Energy policy and the environment report no. 8, Apr. Manhattan Institute for Policy Research, New York. Available at
http://www.manhattan-institute.org/html/eper_08.htm