Vishnu Vardhan Reddy, Bana, and Puviarasi R. “Design of a Low Cost Heartbeat Monitoring System”. International Journal of Psychosocial Rehabilitation 24, no. 2 (April 30, 2020): 5894–5899. Accessed June 9, 2025. https://www.psychosocial.com/index.php/ijpr/article/view/2466.