Pahendra, Iwan, Eva Damila, and Ermatita. “CO2 (Carbon Dioxide) Metric Monitoring Tool Based on Internet of Things (IoT)”. Jurnal Mantik 4, no. 3 (November 1, 2020): 2013-2016. Accessed September 2, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/1059.