A. A. Elbashir and S. M. Merghani, “Spectrophotometric determination of ranitidine hydrochloride (RNH) in pharmaceutical formulation using 9-fluorenylmethyl chloroformate (FMOC-Cl)”, Asian J Pharm Res Dev, vol. 6, no. 6, pp. 7–14, Dec. 2018.