Abbas, Aws W, et al. “Assessment of Serum and Salivary Ceruloplasmin Level in Patients With Oral Lichen Planus”. Journal of Baghdad College of Dentistry, vol. 26, no. 3, Sept. 2014, pp. 53-57, https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/516.