AFRIAN, C.; HARYANTO, A.; HASANUDIN, U.; ZULKARNAIN, I. PRODUKSI BIOGAS DARI CAMPURAN KOTORAN SAPI DENGAN RUMPUT GAJAH (Pennisetum Purpureum). Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), [S. l.], v. 6, n. 1, 2017. Disponível em: https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/1325. Acesso em: 18 oct. 2025.