Dao, V. H. et al. (2018) “A New Method of Measuring Impedance Cardiography for Cardiac Output Estimation by Directly Digitizing the High Frequency Modulated Signal at Lower Sampling Rate”, Old Journal, (131C), pp. 94–99. Available at: https://jst.vn/index.php/old/article/view/709 (Accessed: 5 October 2025).