[1] M.M. Ardehali, rural energy development in Iran: Non-renewable and renewable resources, 2005.
[7] D.I. Stern, Energy and economic growth in the USA. Energy Economics 15, 137–150, 1993.
[11] J. A. Burger, “Soil and Long-Term Site Productivity Values,” pp. 165–189 in Bioenergy from Sustainable Forestry: Guiding Principles and Practices. 2002.
[14] P.K. Menyah, Y. Wolde-Rufael, CO2 emissions, nuclear energy, renewable energy and economic growth in the US. Energy Policy 38,2911–2915, 2010.