Shafie, S. M., Z. Othman, and N. Hami. “Optimum Location of Biomass Waste Residue Power Plant in Northern Region: Economic and Environmental Assessment”. International Journal of Energy Economics and Policy, vol. 10, no. 1, Nov. 2019, pp. 150-4, https://econjournals.com/index.php/ijeep/article/view/8338.