Ngô TTX, Lê Đức A, Nguyễn QM. Electrochemical analysis of sildenafil citrate on electrode modified with nitrogen and sulfur-doped reduced graphene oxide. hueuni-jns [Internet]. 2025Jun.17 [cited 2025Aug.21];134(1C). Available from: http://222.255.146.83/index.php/hujos-ns/article/view/7820