Optimization of Citric Acid Production by Substrate Selection Using Gamma Ray Induced Mutant Strain of Aspergillus niger. Global Journal of Medical Research, [S. l.], v. 17, n. C2, p. 23–30, 2017. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/1413. Acesso em: 24 may. 2026.