M. I. Azman and W. N. H. Wan Kairuddin, “IoT-Based Early Warning Detection System for LPG Leakage Using Raspberry Pi”, EEEE, vol. 3, no. 2, pp. 467–473, Nov. 2022, Accessed: Mar. 12, 2026. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/7766