Shaimenova, B., G. Ospankulova, S. Saduakhasova, L. Murat, and D. Toimbayeva. “Improving the Citric Acid Production by Mutant Strains Aspergillus Niger Using Carbohydrate-Containing Raw Materials As a Carbon Source”. Potravinarstvo Slovak Journal of Food Sciences, vol. 18, Feb. 2024, pp. 157-73, doi:10.5219/1948.