Bhattacharya, P. T., Pal, S., Sinha, R., Misra, M., & Bhattacharya, A. (1970). An Upper Lip Swelling: A Case Report, Differential Diagnosis and Review of Literature. Journal of Orofacial Research, 3(2), 136-139. https://mansapublishers.com/jofr/article/view/1909