Erdoğan, S., E. İsmail Çevik, and A. Gedikli. “Healthcare Expenditures Channel of Natural Resource Curse: The Case of Gulf Cooperation Council Countries”. International Journal of Energy Economics and Policy, vol. 10, no. 2, Jan. 2020, pp. 285-93, https://econjournals.com/index.php/ijeep/article/view/8667.