1. A survey on adaptive control systems;Aseltine;IRE Trans. Automat. Control,1958
2. Bibliography on adaptive control systems;Asher;Proc. IEEE,1976
3. Introduction to stochastic Control Theory;Åström,1970
4. System Identification- A Survey;Åström;Automatica,1971
5. Åström K. J. and B. Wittenmark (1984), Computer Controlled Systems, Prentice-Hall Information and Systems Sciences Series.