Kutlu, R., K. Sarac, O. Balat, M. Turgut, and A. Buhur. “Prenatal Diagnosis of Sacrococcygeal Teratoma : A Case Report”. Annals of Medical Research, vol. 4, no. 2, May 2021, pp. 0219-21, http://www.annalsmedres.org/index.php/aomr/article/view/2590.