Utilization of biogas as a source of electrical energy to support energy independent cages for dairy Cattle Farmers Group Sumber Sari, Ngablak, Magelang. Community Empowerment, [S. l.], v. 7, n. 3, p. 562–569, 2022. DOI: 10.31603/ce.6138. Disponível em: https://journal.unimma.ac.id/ce/article/view/6138. Acesso em: 28 sep. 2026.