Nasuha Zolkefly, Nurul, Ismahafezi Ismail, Suhailan Safei, Syadiah Nor Wan Shamsuddin, and Mohd Azhar M. Arsad. “Head Gesture Recognition and Interaction Techniques in Virtual Reality: A Review”. International Journal of Engineering & Technology 7, no. 4.31 (December 9, 2018): 437–440. Accessed April 29, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/23725.