Iram, Mahvash, and Shobha Rani R. H. “ESTIMATION OF METOPROLOL IN HUMAN PLASMA BY HPLC METHOD”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 7, no. 1, Jan. 2015, pp. 442-6, https://www.journals.innovareacademics.in/index.php/ijpps/article/view/3930.