Oyebanji, Ibitoye J., et al. “Green Growth Policies and Sustainable Economic Growth in South Africa: An Autoregressive Distributed Lag and Toda‑Yamamoto Approach”. International Journal of Energy Economics and Policy, vol. 9, no. 1, Dec. 2018, pp. 184-93, https://econjournals.com.tr/index.php/ijeep/article/view/6563.