1. Kalman, R.E.: Controllability of linear systems. Contribut. Differ. Equ. 1, 190–213 (1963)
2. Texts in Applied Mathematics;RF Curtain,1995
3. Barnett, S.: Introduction to Mathematical Control Theory. Clarendon Press, Oxford (1975)
4. Klamka, J.: Stochastic controllability of linear systems with state delays. Int. J. Appl. Math. Comput. Sci. 17(1), 5–13 (2007)
5. Klamka, J.: Stochastic controllability of linear systems with delay in control. Bullet. Polish Acad. Sci. 55, 23–29 (2007)