Altamirano-Cubas, Analith, et al. “Optimization of Anaerobic Digestion under Psychrophilic Conditions Using Plant Biofilms: Evaluation of Biogas Yield and Quality in a Rural Tubular Biodigester”. Renewable Energy, Biomass & Sustainability, vol. 7, no. 2, Dec. 2025, pp. 28-39, doi:10.56845/rebs.v7i2.658.