Shobana T S, M Dakshayini, and K R Venugopal. “Review on Contactless Vital Sign Monitoring: Techniques and Applications of Remote Photoplethysmography and Photoplethysmography for Remote Health Monitoring”. International Journal of Computer Information Systems and Industrial Management Applications 18, no. 4s (July 2, 2026): 1376–1383. Accessed July 26, 2026. https://cspub-ijcisim.org/index.php/ijcisim/article/view/2643.