Moniruddin, A., H. M. S. . Raihan, T. . Hasan, M. N. . Nahar Khanom, M. A. B. . Shaikat, B. . Ferdous, M. R. . Khan, and M. A. . Rouf. “Primary Umbilical Endometriosis (Villar’s Nodule): A Rare Symptomatic Umbilical Pathology in An Adult Woman”. KYAMC Journal, vol. 13, no. 1, June 2022, pp. 56-60, doi:10.3329/kyamcj.v13i1.59883.