AL-KHALILI, A. A.; BILLICK, R. Umbilical Endometriosis. Sultan Qaboos University Medical Journal, [S. l.], v. 17, n. 3, p. 371–372, 2017. DOI: 10.18295/squmj.2017.17.03.023. Disponível em: https://journals.squ.edu.om/index.php/squmj/article/view/2243. Acesso em: 7 may. 2024.