R. D. Bahmanshir, A. A. N. Meidani, M. K. Mashhadi, and N. Salehnia, “Reversibility Test of Oil Demand Function of OECD Countries Importing Oil from Iran with an Emphasis on Technological and Environmental Considerations: Symmetric and Asymmetric Models”, IJEEP, vol. 8, no. 2, pp. 132–139, Mar. 2018.