Borhan, H., A. R. Ridzuan, G. Subramaniam, S. Mohd Amin, and R. Mat Saad. “Modelling the Environmental Kuznets Curve of Water Pollution Impact on Economic Growth in Developing Country”. International Journal of Energy Economics and Policy, vol. 11, no. 5, Aug. 2021, pp. 545-52, https://econjournals.com/index.php/ijeep/article/view/11571.