Nguyen, T.-L., and Q.-H. Tran. “Constructing Waveform of P, Q, R, S, and T Waves in ECG Signals for Cardiovascular Disease Diagnosis”. HPU2 Journal of Science: Natural Sciences and Technology, vol. 5, no. 01, Apr. 2026, pp. 65-75, doi:10.56764/hpu2.jos.2026.5.01.65-75.