Tehranchian, Amir Mansour, and Mohammad Abdi Seyyedkolaee. “The Impact of Oil Price Volatility on the Economic Growth in Iran: An Application of a Threshold Regression Model”. International Journal of Energy Economics and Policy, vol. 7, no. 4, Sept. 2017, pp. 165-71, https://econjournals.com/index.php/ijeep/article/view/4945.