1. Krstic, M., Kanellakopoulos, I., Kokotovic, P.V.: Adaptive nonlinear control without overparametrization. Syst. Control Lett. 19, 177–185 (1992)
2. Krstic, M., Kanellakopoulos, I., Kokotovic, P.V.: Nonlinear and Adaptive Control Design. Wiley, New York (1995)
3. Astolfi, A., Karagiannis, D., Ortega, R.: Nonlinear and Adaptive Control with Applications. Springer, Berlin (2007)
4. Tong, S., Min, X., Li, Y.: Observer-based adaptive fuzzy tracking control for strict-feedback nonlinear systems with unknown control gain functions. IEEE Trans. Cybern. 50(9), 3903–3913 (2020)
5. Cao, Y., Song, Y.D., Wen, C.Y.: Practical tracking control of perturbed uncertain nonaffine systems with full state constraints. Automatica 110, 108608 (2019)