A. K. Mohammed, S. B. Dikran, and M. A. S. Alubydi, “Univariate and Simplex Optimization for The Analysis of Diphenhydramine-HCl Through Ion-pair Formation”, IHJPAS, vol. 24, no. 1, Dec. 2016, Accessed: May 01, 2025. [Online]. Available: https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/864