Beksaç, S., T. Özlü, S. Balcı, M. Alikaşifoğlu, and N. Çakar. “Selective Feticide of The Aneuploid Fetus in a Twin Pregnancy: A Case Reports”. Gynecology Obstetrics &Amp; Reproductive Medicine, vol. 12, no. 1, Apr. 2006, pp. 54-57, https://gorm.com.tr/index.php/GORM/article/view/565.