Shafia Afridi, Asma Ambareen, Shagufta Naz. “Comparative Efficacy of Clomiphene Citrate and Letrozole in Treating Infertility in Women With Polycystic Ovary Syndrome”. Pakistan Journal of Medical & Health Sciences, vol. 17, no. 10, Oct. 2023, p. 408, doi:10.53350/pjmhs20231710408.