Pourghasemi, A., and M. Akhbari. “The Role of Fossil Fuel (Oil and Gas) in the World Geopolitics of Energy (Case Study of Iran 2000-2015)”. Journal of Ecophysiology and Occupational Health, vol. 18, no. 1-2, June 2018, pp. 18-23, doi:10.18311/jeoh/2018/21369.