Thiagarajan, Thineshan Raayar, and Chua King Lee. “Development of a Portable Solar-Powered Ventilator With Bpm and Spo2 Monitoring System”. Evolution in Electrical and Electronic Engineering 5, no. 1 (April 21, 2024): 18–26. Accessed April 9, 2026. https://penerbit.uthm.edu.my/periodicals/index.php/eeee/article/view/15314.