Topçu, H. O., A. İrfan Güzel, K. Kokanalı, S. Cavkaytar, D. Uygur, and S. Erkaya. “Maternal Serum Nitric Oxide Levels in Adolescent Pregnancies”. Gynecology Obstetrics &Amp; Reproductive Medicine, vol. 20, no. 2, Aug. 2014, pp. 92-95, https://www.gorm.com.tr/index.php/GORM/article/view/143.