1. Fierro, R., Lewis, F.L., Lowe, A.: Hybrid control for a class of underactuated mechanical systems. IEEE Trans. Syst. Man Cybern.-Part A Syst. Hum. 29(6), 649–654 (1999)
2. Xu, K., Duan, X.D.: Comparative study of control methods of single rotational inverted pendulum. In: Proceedings, International Conference on Machine Learning and Cybernetics, vol. 2, pp. 776–778. IEEE (2002)
3. Anderson, D.P.: nbot balancing robot. http://www.geology.smu.edu/dpa-www/robo/nbot/
4. Uddin, N., Nugroho, T.A., Pramudito, W.A.: Stabilizing two-wheeled robot using linear quadratic regulator and states estimation. In: 2nd International conferences on Information Technology, Information Systems and Electrical Engineering (ICI- TISEE), pp. 229–234. IEEE (2017)