1. Chen, C.T.: Linear System Theory and Design. Holt, Rinehart and Winston, New York (1984)
2. Horowitz, I.M.: Synthesis Feedback Systems. Academic Press, New York (1963)
3. Dorf, R.C., Bishop, R.H.: Modern Control Systems. 9th edn. Prentice Hall, Upper Saddle River (2001)
4. Goodwin, G.C., Graebe, S.F., Salgado M.E.: Control System Design. Prentice Hall, Upper Saddle River (2001)
5. Corless, M.J., Leitmann, G., Ryan, E.P.: Tracking in the Presence of Bounded Uncertainties, Presented at the 4th International Conference on Control Theory, Cambridge, UK (1984)