Yusoff, Yusmahaida, Mardiah Morsin, Yuzi Saidun, and Muhammad Hashim Dahri. 2024. “A Study On The Development Of A Heart Rate Monitoring System To Determine Its Accuracy And Effectiveness”. International Journal Of Technical Vocational And Engineering Technology 5 (2): 11-21. https://journal.pktm.com.my/index.php/ijtvet/article/view/174.