Saudi, Mohd Haizam Mohd, et al. “The Role of Renewable, Non-Renewable Energy Consumption and Technology Innovation in Testing Environmental Kuznets Curve in Malaysia”. International Journal of Energy Economics and Policy, vol. 9, no. 1, Dec. 2018, pp. 299-07, https://econjournals.com./index.php/ijeep/article/view/7327.