“Influence Of Different Coumarin Derivatives On Mycological Production Of Citric Acid By Aspergillus Niger Mutagens”, IJFANS, vol. 11, no. Special Issue 3, pp. 1592–1599, Jan. 2022, Accessed: Sep. 05, 2026. [Online]. Available: https://www.ijfans.org/index.php/Journal/article/view/9097