Rumbia, Wali Aya, et al. “Crude Oil Prices, Household Spending and Economic Growth in the ASEAN-4 Region: An Analysis of Nonlinear Panel Autoregressive Distributed Lag”. International Journal of Energy Economics and Policy, vol. 10, no. 4, May 2020, pp. 437-42, https://econjournals.com/index.php/ijeep/article/view/9293.