W. S. Wan Zaki, R. Correia, S. Korposh, B. R Hayes-Gill, and S. P Morgan, “Cuff-Less Continuous Blood Pressure Monitoring System Using Pulse Transit Time Techniques”, IJIE, vol. 8, no. 1, Apr. 2016, Accessed: Aug. 07, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/ijie/article/view/1401