Gia-Thinh Bui. “POLYMER-BASED CAPACITIVE MICRO-MACHINED ULTRASONIC TRANSDUCER FOR 3D PROXIMITY DETECTION”. UTEHY Journal of Applied Science and Technology, Vol. 37, Mar. 2023, pp. 7-12, http://tapchi.utehy.edu.vn/index.php/jst/article/view/580.