Mohi-Aldin, M. . O. and Hussain, A. . M. (2017) “Optimization of Citric acid production from Locally isolate fungus Aspergillus niger by solid state fermentation”, Ibn AL- Haitham Journal For Pure and Applied Sciences, 28(2), pp. 208–224. Available at: https://jih.uobaghdad.edu.iq/index.php/j/article/view/226 (Accessed: 24 May 2022).