Malzi, M. J., Ettahir, A., & Hanchane, S. (2019). Responsiveness of Residential Natural Gas Demand to Elderly, Urban Population and Density: Evidence from Organization for Economic Co-operation and Development Countries. International Journal of Energy Economics and Policy, 9(4), 388–395. Retrieved from https://econjournals.org.tr/index.php/ijeep/article/view/7531