1. F. Ikhouane, M. Krstić, Robustness of the tuning functions adaptive backstepping design for linear systems, Proc. 34th Conf. on Decision & Control, New Orleans, LA, 1995, pp. 159–164.
2. Adaptive backstepping: robustness and Asymptotical performance;Ikhouane;Automatica,1997
3. P.A. Ioannou, J. Sun, Robust Adaptive Control, Prentice-Hall, Englewood Cliffs, NJ, 1995.
4. A robust direct adaptive controller;Ioannou;IEEE Trans. Automat. Control,1986
5. M. Kristic, I. Kanellakopoulos, P.V. Kokotović, Nonlinear and Adaptive Control Design, Wiley, New York, 1995.