Soni, M.; Gupta, J.; Meena, A. Lomiphene Citrate Versus Letrozole As First Line Ovulation Induction Drug in Infertile Anovulatory Polycystic Ovarian Syndrome Women: A Prospective Randomized Controlled Trial. Int J Reprod Contracept Obstet Gynecol 2020, 9, 2512-2515.