W. . Okotubu, B. . Okotubu, I. . Obanla, N. . Adebisi, E. . Ikwuoche, and L. Okoro, “OPTIMIZATION PRODUCTION OF CITRIC ACID BY Aspergillus niger THROUGH SUBMERGED FERMENTATION OF DRIED ORANGE PEELS FROM GONIN-GORA, CHIKUN L.G.A., KADUNA STATE, NIGERIA ”, JCSN, vol. 50, no. 4, Aug. 2025.