Uysal Derbent, Ayşe, Neval Çayönü, Mustafa Sakallı, Mehmet Karaca, and Selahattin Kumru. 2012. “Velamentous Insertion of Umbilical Cord: A Case Report and Review of the Literature”. Gynecology Obstetrics &Amp; Reproductive Medicine 18 (3). Ankara, TR:151-53. https://gorm.com.tr/index.php/GORM/article/view/267.