Tran, T.-T., Pham, V.-T. and Bui, D.-T. (2018) “A Variational Mode Decomposition-Based Approach for Heart Rate Monitoring using Wrist-Type Photoplethysmographic Signals during Intensive Physical Exercise”, Old Journal, (131C), pp. 100–104. Available at: https://jst.vn/index.php/old/article/view/710 (Accessed: 2 August 2025).