Shamima, M. N., M. A. Hossain, S. Jesmin, N. Jahan, and A. Das. “Umbilical Endometriosis in a 42 Years Old Parous Woman: A Case Report”. TAJ: Journal of Teachers Association, vol. 28, no. 1, Dec. 2018, pp. 48-51, doi:10.3329/taj.v28i1.39070.