Ochate, John Michael Andrew, et al. “Development of Gas Leakage Detector Using Arduino and Sensor Device With SMS Notification and Backup System: Vol.4, No.1”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, vol. 3, no. 2, Apr. 2024, https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/14023.