Roespinoedji, Djoko, et al. “Experimenting the Long-Haul Association Between Components of Consuming Renewable Energy: ARDL Method With Special Reference to Malaysia”. International Journal of Energy Economics and Policy, vol. 9, no. 6, Oct. 2019, pp. 453-60, https://mail.econjournals.com/index.php/ijeep/article/view/8694.