Hassan, Z. B. “Comparison Between Tamoxifen and Clomiphene Citrate for Induction of Ovulation and Successful Conception in Polycystic Ovarian Syndrome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 4, no. 5, Feb. 2017, pp. 1349-52, doi:10.18203/2320-1770.ijrcog20150709.