I. Nyoman Suprapta Winaya, Davin, Rukmi Sari Hartati, I. Wayan Gede Ariastina, I. Made Agus Putrawan, Rolf Warthmann. “Biogas Yield from Mesophilic to Thermophilic Digesters Using Cocoa Shell As Substrate ”. International Journal of Advanced Science and Technology 29, no. 04 (June 6, 2020): 8945 -. Accessed July 27, 2024. http://sersc.org/journals/index.php/IJAST/article/view/30676.