Wen, Tee Yi, Nurul Aini Bani, Firdaus Muhammad-Sukki, and Siti Armiza Mohd Aris. “Electroencephalogram (EEG) Human Stress Level Classification Based on Theta Beta Ratio”. International Journal of Integrated Engineering 12, no. 6 (July 19, 2020): 174–180. Accessed July 23, 2024. https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/6598.