Surib, Nur Atiqah, Fathihah Nabila Mohammad Azlan, NorRuwaida Jamian, Mohd Rashid Mohd Yusof, Khairunnisa Mohd Paád, and Wuled Lenggoro. “Shinyei Based Sensor With Added Roof Enhanced Detection of Indoor Particulate Matter”. International Journal of Integrated Engineering 11, no. 7 (November 8, 2019): 67-76. Accessed June 15, 2021. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4435.