Azzahra, S. T. A. “Synergism Each Isolates of Thermophilic Bacteria SSA2, SSA3, SSA4, and SSAS6 in Xylanase Production”. Jurnal Serambi Biologi, Vol. 8, no. 2, June 2023, pp. 134-7, doi:10.24036/srmb.v8i2.180.