Basha, Soha, Hazar Al-Harbi, and Sahar El-Refai. “An Experimental Study on Histological Evaluation of the Effect of Pure Nicotine and Pentoxifylline Gel on Oral Ulcers”. New Frontiers in Medicine and Medical Research Vol. 12 (August 27, 2021): 168–176. Accessed June 3, 2026. https://stm.bookpi.org/NFMMR-V12/article/view/3676.