Mohammadi, T. and Taherkhani, A. (2009). Investigate the relationship between crude oil and natural gas prices, Quarterly Energy Economics Studies, Sixth year, Issue 22, autumn, pages 53-70.
Mansour Kiai, I. (2008). Estimate the relationship between the price of crude oil and liquefied natural gas (LNG), Quarterly Energy Economics Studies, Fifth year, Issue 18, autumn, pages 99-121.
Nikooeqbal, A. A.; Gandli Alikhani, N. and Naderi, E. (2013). investigate the effects of short-term and long-term dynamics of oil prices on the price of methanol (Case Study of Iran), Quarterly Journal Applied Economics, Fourth year, Issue XII.
Houshmand, M. and Fahimi Doab, R. (2010). Investigate the long term relation between the real price of crude oil and the dollar real value of America. Journal of Financial Engineering and portfolio management, the fourth Issue, autumn.
Bazzazan, F. (2009) Investigate the long relation between oil price and the dollar exchange rate America, in two ways Johansen-Juselius and ARDL. Energy Economics Studies Quarterly, Volume VI, the autumn, pages 93-117.
Behradmehr, N. (2008). "crude oil price forecast using wavelet smoothing and artificial neural networks", Quarterly Journal of Energy Economics Studies, No. 18, pages 81-98.
Pour Kazemi, Mohammad Hossein (2006). "Iranian Petrochemical Complex assessment using data envelopment analysis," Peik Noor, No. 14, pages 34-43.
Mohazzab Torabi, S.; and Najafzadeh, K. (2011). "The role of energy efficiency in protecting the environment and sustainable development", the twenty-sixth International Conference on Power, pages 1-10.
Dehghani, T. (2007), "technical and economic evaluation of the use of fuels LPG, CNG and petrol in the transport sector of the country", the Sixth National Conference on Energy, pages 1-10.
Jalali Naini, A. R.; Keshavarz Haddad, G.; Eskandari Zanjani, R., and Zamani, M. (2009). " Investigate the causal relationship between oil price and the market price of petroleum products in the US and Europe", Quarterly Journal of Economic Energy Studies, Issue 22, pages 1-27.
Ramberg, D.J., Parsons, J.E., (2011). theWeak Tie Between Natural Gas And Oil Prices, MIT Center For Energy And Environmental Policy Research, Cambridge,No. E19-411, PP. 1-24.
Barbiroli, G., (2002). Sustainable Economic Systems, Principles of Sustainable Development, Vol. I, PP. 1-10.
Engstrom, Daniel, (2014). Pricing of Liquefied Petroleum Gas in North-West Europe, Faculty of Engineering, Centre for Mathematical Sciences Mathematical Statistics, LUND University.
Keltt, T.R., Gautier, D.L., Ahlbrandt, T.S. (2007). An Evaluation Of The USGS World Petroleum Assessment 2000—Supporting Data, Science For A Changing World, Vol.1021, PP. 1-9.