Hoang, Si Hong, Dinh Minh Nguyen, Duc Thuan Nguyen, Thi Hai Nghiem, Xuan Trung Duc Dinh, and Viet Toan Le. “Designing a Partly Self-Powered Keyboard Based on Triboelectric Effect”. JST: Smart Systems and Devices 31, no. 2 (September 15, 2021): 35–42. Accessed June 18, 2025. https://jst.vn/index.php/ssad/article/view/121.