عيسى علا, and هلا بركات. “Simultaneous Determination of Metformin and Sitagliptin in Their Tablet Formulations Using Derivative Spectrophotometric Methods”. Tishreen University Journal -Medical Sciences Series 45, no. 5 (December 4, 2023): 543–567. Accessed November 28, 2024. https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/15996.