Azahar, Mohd Azrol, Mohd Shamian Zainal, Nor Shahidah Mohd Shah, Danial Md Nor, Shipun Anuar Hamzah, and Masnani Mohamed. 2020. “IoT-Based Air Quality Device for Smart Pollution Monitoring”. Progress in Engineering Application and Technology 1 (1): 284-95. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/258.