Abdulatif, Muhamed Omar, Hyder H. Assmaeel, Raghad kadhim Obeid, and Ayat Adnan abbas. “Optimal Conditions For Production Acidic D-Xylanase By Aspergillus Niger in Submerged Fermentation”. Journal of Biotechnology Research Center 5, no. 3 (December 1, 2011): 14–21. Accessed May 19, 2024. https://www.jobrc.org/index.php/jobrc/article/view/174.