Reham R. Elkhateeb, and Ahmad Mahran. “Optimized Letrozole Dose Versus Traditional Use of Clomiphene Citrate for Ovulation Induction in Patients With PCOS: A Prospective Randomized Controlled Trial”. Gynecology and Obstetrics Research, vol. 3, no. 1, May 2016, pp. 7-12, https://openventio.us/index.php/GOR/article/view/1386.