NGUYEN, Hoang Dung. An IoT-Based Heart Rate and SpO₂ Wearable Device for Centralized Patient Monitoring in Viet Nam: Design and Preliminary Assessment. Smart Systems and Devices, [S. l.], v. 36, 2026. Disponível em: https://jst.vn/index.php/ssad/article/view/1393. Acesso em: 20 jul. 2026.