M. . O. Mohi-Aldin and A. . M. Hussain, “Optimization of Citric acid production from Locally isolate fungus Aspergillus niger by solid state fermentation”, IHJPAS, vol. 28, no. 2, pp. 208–224, Mar. 2017, Accessed: Dec. 04, 2024. [Online]. Available: https://jih.uobaghdad.edu.iq/index.php/j/article/view/226