Mohd Azam, Siti Nurfarah Ain, Khairul Azami Sidek, and Ahmad Fadzil Ismail. 2018. “Photoplethysmogram Based Biometric Identification Incorporating Different Age and Gender Group”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10 (1-5):101-8. https://jtec.utem.edu.my/jtec/article/view/3639.