Umadi, Lina Fadhilah, Siti Nurfarah Ain Mohd Azam, and Khairul Azami Sidek. 2016. “Cardiac Irregularity Detection Using Photoplethysmogram Signal”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 8 (4):161-66. https://jtec.utem.edu.my/jtec/article/view/1193.