Triyanti, V., H. Iridiastadi, W. . Aribowo, and Y. Yassierli. “Working With Cognitive Load Task: Mental Fatigue, Sleepiness, and Performance”. Journal of Modern Manufacturing Systems and Technology, vol. 8, no. 2, Sept. 2024, pp. 33-41, https://journal.ump.edu.my/jmmst/article/view/10789.