Doshi , N. P., S. A. Shah, K. B. Patel, and M. F. Jhabuawala. “Histological Grading of Oral Cancer: A Comparison of Different Systems and Their Relation to Lymph Node Metastasis”. National Journal of Community Medicine, vol. 2, no. 01, June 2011, pp. 136-42, https://njcmindia.com/index.php/file/article/view/1863.