R. K. Papanna, J. B. Krishnegowda, and P. Nagaraja, “SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF CEFEPIME, CEFAZOLIN SODIUM AND CEFALOTHIN SODIUM IN PURE AND PHARMACEUTICAL DOSAGE FORMS BY USING NINHYDRIN”, Int J Pharm Pharm Sci, vol. 7, no. 5, pp. 194–199, May 2015.