Shafie, Shafini Mohd, Z. Othman, N. Hami, and S. Omar. “The Potential of Using Biogas Feeding for Fuel Cells in Malaysia”. International Journal of Energy Economics and Policy 10, no. 1 (November 13, 2019): 109–113. Accessed November 24, 2024. https://econjournals.com./index.php/ijeep/article/view/8373.