Sudarma, A. F.; Hartulistiyoso, E.; Purwanto, Y. A.; Nelwan, L. O.; Farobie, O.; Darsono, N.; Arifin, K.; Solikhah, M. D.; Yulni, T.; Hidayat, I. Influence of Inorganic Content on Hydrochar Quality from High-Ash Agar Extraction Waste via Hydrothermal Carbonization. Sinergi 2026, 30, 731-746.