Taher, Mustafa Gheni. “Prevalence of Recurrent Aphthous Ulceration in the Diyala Population”. Diyala Journal of Medicine 15, no. 2 (December 20, 2018): 112–118. Accessed January 17, 2026. https://www.djm.uodiyala.edu.iq/index.php/djm/article/view/187.