Al-Mahin, Abdullah, Shek Mahdi Hasan, Mahboob Hossain Khan, and Rehana Begum. 2010. “Citric Acid Production by <i>Aspergillus niger</i> Through Solid-State Fermentation on Sugarcane Bagasse”. Bangladesh Journal of Microbiology 25 (1):9-12. https://doi.org/10.3329/bjm.v25i1.4664.