E. Hartati, N. Aiman Musodiqoh, E. Nurlina, and D. Agustian Permadi, “Effect of Hyphomicrobium sp. in Biogas Formation from Organic Waste Treated by Batch Mode Anaerobic Digestion: DOI: 10.32526/ennrj.18.3.2020.24”, Environ. Nat. Resour. J., vol. 18, no. 3, pp. 257–267, Apr. 2020.