Al-Azzawi, Lehadh M, and Layla S Al-Ani. 2014. “Immunohistochemical Expression of p53 and PCNA Proteins in Oral Lichen Planus and Oral Dysplasia”. Journal of Baghdad College of Dentistry 26 (1): 98-102. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/304.