Y., N. F. I., M. Ibrahim, N. A. S.B., and N. Manap. “Development of Yawning Detection Algorithm for Normal Lighting Condition and IR Condition”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 2-13, Sept. 2017, pp. 29-34, https://jtec.utem.edu.my/jtec/article/view/2561.