1. International Energy Agency (IEA) Golden rules for a golden age of gas, World Energy Outlook special report on unconventional gas 2012 www.eia.org [
2. U.S. Energy Information Administration Internal energy outlook, report No. DOE/EIA-0484 2011 www.eia.gov/ieo/pdf/0484(2011).pdf
3. U.S. Energy Information Administration Annual Energy Outlook 2012 with projections to 2035 Report No. DOE/EIA-0383 2012 www.eia.gov/forecasts/aeo
4. International Petroleum Industry Environmental Conservation Association (IPIECA) Saving energy in the oil and gas industry 2007 www.ipieca.org/system/files/publications/Saving_Energy.pdf
5. Measurement of solar energy radiation in Abu Dhabi, UAE;Islam;Applied Energy,2009