Nguyen Thi Hang, SYLWIA GWOŹDZIEWICZ, Trung-Hieu Le, Dinh Tran Ngoc Huy, Le Thi Thanh Huong,. “Recognition of User Activity With a Combined Image and Accelerometer Wearable Sensor”. Design Engineering (August 4, 2021): 6407- 6421. Accessed April 18, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/3139.