Kamal Ahmed El khashishy, Mohamed Ibrahim EL-Ghareeb EL. Ganainy, M. T. M. A. E. S. M. A. E. fattah A. M. . “Role of Interleukin 9 in Oral Lichen Planus Pathogenesis and Management”. Annals of the Romanian Society for Cell Biology, vol. 25, no. 6, June 2021, pp. 11614-2, https://www.annalsofrscb.ro/index.php/journal/article/view/7676.