“Optimization of Medium Constituents for Citric Acid Production from Groundnut Husk by Aspergillus niger”, Nigerian J Biochem Molecul Biol, vol. 37, no. 2, pp. 97–103, Jul. 2022, Accessed: Sep. 15, 2025. [Online]. Available: https://www.nsbmb.org.ng/journals/index.php/njbmb/article/view/56