Sulaiman, Noor Asyikin, Azdiana Md. Yusop, and Sharatul Izah Samsudin. 2015. “Solving Tracking Problem of a Nonholonomic Wheel Mobile Robot Using Backstepping Tecnique”. Journal of Mechanical Engineering and Technology (JMET) 2 (1):85-92. https://jmet.utem.edu.my/jmet/article/view/381.