Engin Üstün, Yaprak, Yusuf Üstün, Kezban Doğan, Özkan Ateş, and Ramazan Kutlu. 2007. “Subarachnoid Hemorrhage of Unknown Origin During Pregnancy: Case Report”. Gynecology Obstetrics &Amp; Reproductive Medicine 13 (3). Ankara, TR:182-83. https://gorm.com.tr/index.php/GORM/article/view/547.