Khalifani, A., N. Valizadeh, A. Fattazadeh, et R. Pourali. Comparing the Effects of Letrozole and the Effects of Routine Treatment of Polycystic Ovary Syndrome in Improving Symptoms of Hyperandrogenism. Amazonia Investiga, Vol. 8, nᵒ 18, Feb. 2019, p. 133-8, https://amazoniainvestiga.info/index.php/amazonia/article/view/289.