SITTI JUBAIRA UMAR; AB KADIR, Diyana. An IoT based Portable Air Quality Monitoring System with CO and CO2 Detector. Journal of Computing Technologies and Creative Content, [S. l.], v. 5, n. 1, p. 37–42, 2020. Disponível em: https://ejournal.unikl.edu.my/index.php/JTeC/article/view/762. Acesso em: 13 mar. 2026.