I. Udo, I., and R. Alexis Ukpe. “Determination of the Effect of Concentration of Sodium Benzoate in Fruit Juice Containing Ascorbic Acid”. Nigerian Journal of Pharmaceutical and Applied Science Research, vol. 11, no. 4, Feb. 2023, pp. 20-27, doi:10.60787/nijophasr-v11-i4-511.