1. Sagues, P. Microprocessors for Measurement and Control;Auslander,1981
2. Mathematical Methods of Optimal Control;Boltyanskii,1971
3. A dual-mode speed control system for an induction motor;Brown,1984
4. Variable Structure Control of Nonlinear Multivariable Systems: A Tutorial;DeCarlo,1987
5. Ferguson, J.D. and D. L. Stephens (1974). Time optimal control within a dual mode constraint. IEEE Trans. Industrial Electronics and Control Instrumentation, IECI-21, No. 2, May.