Optimization of Medium Constituents for Citric Acid Production from Groundnut Husk by Aspergillus niger. Nigerian Journal of Biochemistry and Molecular Biology, Nigeria, v. 37, n. 2, p. 97–103, 2022. Disponível em: https://www.nsbmb.org.ng/journals/index.php/njbmb/article/view/56. Acesso em: 15 sep. 2025.