Yunardi, Riky Tri, and Nasa Zata Dina. “Visual and Gyroscope Sensor for Head Movement Controller System on Meal-Assistance Application”. Majlesi Journal of Electrical Engineering 14, no. 3 (May 28, 2020). Accessed September 27, 2020. http://mjee.iaumajlesi.ac.ir/index/index.php/ee/article/view/3630.