Tanır, B., M. S. Kütük, M. Dolanbay, M. T. Özgün, S. Uludağ, E. Aygen, and Y. Şahin. “Comparison of Gonadotropin With Gonadotropin and Letrozole Combination in Infertile Women With Biopsy - Proven Endometriosis Undergoing Intracytoplasmic Sperm Injection”. Gynecology Obstetrics &Amp; Reproductive Medicine, vol. 20, no. 1, Apr. 2014, pp. 38-43, https://gorm.com.tr/index.php/GORM/article/view/128.