Y. Ahmad, Tareq, Fadwa KH. Tawfeeq, and Safaa A. AL-Ameen. “Biochemical Study of Dipeptidylpeptidase-4 from Normal Human Serum”. Rafidain Journal of Science 27, no. 1 (March 1, 2018): 123–132. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/rsci/article/view/46503.