“Simultaneous Determination of Ciprofloxacin Hydrochloride and Mebeverin Hydrochloride by Derivative Spectrophotometry”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 27, no. 3, Apr. 2017, pp. 448-61, https://jih.uobaghdad.edu.iq/index.php/j/article/view/309.