Hussein, T. M., and S. J. Shakkor. “Spectrophotometric Determination of Phenylephrine Hydrochloride in Pharmaceutical Formulations Using an Oxidative Coupling Reaction”. Central Asian Journal of Medical and Natural Science, Vol. 6, no. 4, Aug. 2025, pp. 2170-81, doi:10.51699/cajmns.v6i4.2946.