George, Anita, et al. “Frequency of Cyclin D1 Insquamous Cell Carcinoma: Does This Have Any Prognostic Implications?”. Journal of Liaquat University of Medical & Health Sciences, vol. 19, no. 03, Oct. 2020, pp. 152-6, http://121.52.154.205/index.php/jlumhs/article/view/392.