I Made Agus Putrawan, Daniel Nett, I Nyoman Suprapta Winaya, Rukmi Sari Hartati, I Wayan Gede Ariastina, Rolf Warthmann, Werner Edelmann, “Evaluation of digester performanceusing the FOS/TAC analysis methodon biogas plant in Bali”, IJAST, vol. 29, no. 05, pp. 14045 - 14053, Oct. 2020.