Karalok, H., Özlem Gürsoy, E. Karalok, Z. Akcığ, and K. Savan. “Unilateral Tubal Obstruction Associated With Contralateral Ectopic Pregnancy”. Gynecology Obstetrics &Amp; Reproductive Medicine, vol. 12, no. 3, Dec. 2006, pp. 226-7, https://gorm.com.tr/index.php/GORM/article/view/611.