Shahida Magsi, Shaista Lashari, Rukhsana Shaikh, Inayat Magsi, Sonia Gul Qureshi. “Unexplained Infertility: Comparison of Efficacy of Letrozole and Clomiphene Citrate”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 03, Apr. 2022, p. 109, doi:10.53350/pjmhs22163109.