Bui Ha Trung, Dang Van Tien, and Hoang Thi Hien. “PPy/NiO HYBRID FILM: FABRICATION, CHARACTERISTICS AND ITS APPLICATION IN NH3 GAS SENSORS AT ROOM TEMPERATURE”. Journal of Applied Science and Technology, Vol. 43, Aug. 2024, pp. 110-5, http://tapchi.utehy.edu.vn/index.php/jst/article/view/742.