D., T. T., R. S, H. S. Shetty, and G. K. S. “Aetiopathology of Ulcers of Oral Cavity and Oropharynx: A Cross Sectional Study”. International Journal of Research in Medical Sciences, vol. 1, no. 4, Jan. 2017, pp. 496-00, https://www.msjonline.org/index.php/ijrms/article/view/2656.