1. Ha, I.J., Gilbert, E.G.: Robust tracking in nonlinear systems. IEEE Transactions Automatic Control 32, 763–771 (1987)
2. Cimen, T., Banks, S.P.: Nonlinear optimal tracking control with application to super-tankers for autopilot design. Automatica 40, 1845–1863 (2004)
3. Gao, D., Tang, G., Zhang, B.: Approximate optimal tracking control for a class of nonlinear systems with disturbances. In: Proceedings of 6th World Congress on Intelligent Control and Automation, Dalian, China, vol. 1, pp. 521–525 (2006)
4. Zhang, H.G., Wei, Q.L., Luo, Y.H.: A novel infinite-time optimal tracking control scheme for a class of discrete-time nonlinear systems via the greedy HDP iteration algorithm. IEEE Transactions on System, Man, and cybernetics-Part B: Cybernetics 38, 937–942 (2008)
5. Werbos, P.J.: A menu of designs for reinforcement learning over time. In: Miller, W.T., Sutton, R.S., Werbos, P.J. (eds.) Neural Networks for Control, pp. 67–95. MIT Press, Cambridge (1991)