Aggarwal, N. ., S. Dutta, A. Choudhury, M. Dutta, S. Das, and R. Sinha. “Non-Malignant Oral Ulcer: A Diagnostic Challenge to Otorhinolaryngologists”. Bengal Journal of Otolaryngology and Head Neck Surgery, vol. 27, no. 3, Dec. 2019, pp. 223-8, doi:10.47210/bjohns.2019.v27i3.11.