1. Some Nonlinear Problem in the Theory of Automatic Control;Lur’e,1957
2. Absolute Stability of Regulator Systems;Aizeman,1964
3. Nonlinear Systems;Khalil,1996
4. Absolute Stabiility of Nonlinear Control Systems;Liao,1993
5. Stability of Stationary Sets in Control Systems with Discontinuous Nonlinearities;Yakubovich,2004