Comfort, Egbichi, et al. “Dynamic Impact of Energy Consumption on the Growth of Nigeria Economy (1986-2016): Evidence from Symmetrical Autoregressive Distributed Lag Model”. International Journal of Energy Economics and Policy, vol. 8, no. 2, Mar. 2018, pp. 188-95, https://mail.econjournals.com/index.php/ijeep/article/view/6318.