S. Salih, E., الهام, and mohammed Al-Enizzi. “Spectrophotometric Assay of Mesalazine in Pharmaceutical Preparations Via Oxidative Coupling Reaction With O-Cresol and Sodium Metaperiodate”. Journal of Education and Science (JES), vol. 29, no. 1, Mar. 2020, pp. 279-92, doi:10.33899/edusj.2020.172815.