Muhsin, Suhaib R, and Ahlam H Majeed. “P16 Protein and Human Papillomavirus (HPV16, 18) Expressions in Oral Lichen Planus and Squamous Cell Carcinoma”. Journal of Baghdad College of Dentistry, vol. 27, no. 4, Dec. 2015, pp. 96-100, https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/956.