بركات ه. ., and اسكيف س. . “Determination of Sildenafil in Herbal Aphrodisiac Products Available in Local Market by TLC and HPLC”. Tishreen University Journal -Medical Sciences Series, vol. 43, no. 3, July 2021, https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/10720.