Othman, Nor Salwati, and Hussain Ali Bekhet. “Dynamic Effects of Malaysia’s Government Spending on Environment Quality: Bridging STIRPAT and EKC Hypothesis”. International Journal of Energy Economics and Policy, vol. 11, no. 5, Aug. 2021, pp. 343-55, https://econjournals.com/index.php/ijeep/article/view/11273.