بركات هلا, and اسكيف سيمون. 2021. “Determination of Sildenafil in Herbal Aphrodisiac Products Available in Local Market by TLC and HPLC”. Tishreen University Journal -Medical Sciences Series 43 (3). https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/10720.