A. Mohammad, Jehan. “Relation of Serum Antioxidants in Patients With Periodontal Disease Status”. Journal of Education and Science 24, no. 1 (March 1, 2011): 29–36. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42020.