"A prospective randomized trial comparing clomiphene citrate with metformin or a combination of both for ovulation induction in poly cystic ovarian Syndrome". 2018. مجلة جامعة اللاذقية - سلسلة العلوم الصحية 39 (4). https://journal.latakia-univ.edu.sy/index.php/hlthscnc/article/view/3961.