Nugraha, Billy, Nadiahun Nasywa, Melodi Laora Putri, Soma Satria, and Yoga Ulya Mubarok. 2026. “Valorization of Palm Oil Mill Effluent (POME) for Renewable Energy: A Systematic Review on Biogas Potential and Policy Implications in Indonesia”. International Journal of Oil Palm 9 (1):20–30. https://doi.org/10.35876/ijop.v9i1.159.