O. D. Oyeyiola, A.O, C. T. Onwordi, and F. T. Abolade O.M, “SPECTROPHOTOMETRIC AND HIGH PERFORMANCE LIQUID CHROMATOGRAHIC DETERMINATION OF SODIUM BENZOATE AND POTASSIUM SORBATE IN SOME SOFT DRINKS”, UJMST, vol. 5, no. 1, pp. 168-178, Jan. 2019.