"Optimization of Extracellular Cellulase Production from a Locally Isolated Bacillus subtilis Strain Using Response Surface Methodology" (2026) AL-Qadisiyah Journal of Biotechnology, 1(1). موجود في: https://qjbt.qu.edu.iq/index.php/qjbt/article/view/3 (تاريخ الوصول: 12 سبتمبر 2026).