B. Saha, N. Arshad, M. Sriariyanun, W. Rodiahwati, and M. P. Gundupalli, “Anaerobic Digestion: Technology for Biogas as a Source of Renewable Energy from Biomass—A Review”, Applied Science and Engineering Progress, vol. 18, no. 4, p. 7895, Oct. 2025.