Mohammed, A. k . “Development of Two New Spectrophotometeric Methods for the Determination of Amitriptyline in Pharmaceutical Preparation Using Univariate and Simplex Optimization”. Ibn AL-Haitham Journal For Pure and Applied Sciences 22, no. 4 (July 28, 2017). Accessed May 1, 2025. https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/1123.