عيسى علا, and هلا بركات. 2023. “Simultaneous Determination of Metformin and Sitagliptin in Their Tablet Formulations Using Derivative Spectrophotometric Methods”. Tishreen University Journal -Medical Sciences Series 45 (5):543-67. https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/15996.