“Optimization of Medium Constituents for Citric Acid Production from Groundnut Husk by Aspergillus Niger”. Nigerian Journal of Biochemistry and Molecular Biology 37, no. 2 (July 1, 2022): 97–103. Accessed September 15, 2025. https://www.nsbmb.org.ng/journals/index.php/njbmb/article/view/56.