[1] H. Abou-Kandil, G. Freiling, V. Ionescu and G. Jank, Matrix Riccati Equations in Control and Systems Theory, Birkhauser, Basel, 2003.

[2] C. E. de Souza and Xi Li, Delay-dependent robust control of uncertain linear state-delayed systems, Automatica 35 (1999), 1313-1321.

[3] B. A. Francis, A Course in Control Theory, Springer-Verlag, Berlin, 1987.

[4] R. Glowinski, J. Periuax and J. Toivanen, Time-periodic solutions of waves equation via controllability and fictitious domain methods, G. Cohen, E. Heikhova, P. Joly and P. Neittaanmaki, eds., Mathematical and Numerical Aspects of Wave Equations, Proc. of Waves, Springer, Jyvaskyla, Finland, 2003, pp. 805-810.

[5] J. Hale and S. V. Lunel, Introduction to Functional Differential Equations, Springer-Verlag, New York, 1993.

[6] Y. He, Q. G. Wang and C. Lin, An improved filter design for systems with time-varying interval delay, IEEE Trans. Circuits Syst. II 53 (2006), 1235-1239.

[7] A. Ichikawa, Product of nonnegative operators and infinite-dimensional Riccati equations, Systems and Control Lett. 41 (2000), 183-188.

[8] X. Ji, H. Su and J. Chu, An LMI approach to robust control for uncertain singular time-delay systems, J. Control Theory Appl. 4 (2006), 361-366.

[9] R. E. Kalman, Y. C. Ho and K. S. Narenda, Controllability of linear dynamical systems, Differ. Equ. 1 (1963), 716-729.

[10] J. Klamka, Controllability of Dynamical Systems, Kluwer Academic Publishers, Dordrecht, 1991.

[11] A. J. Laub, Schur techniques for solving Riccati equations, Feedback Control of Linear and Nonlinear Systems, Lecture Notes in Cont. Inf. Sci., Springer, Berlin, 1982, pp. 165-174.

[12] S. Li and Y. Wang, Adaptive control of synchronous generators with steam valve via Hamiltonian function method, J. Control Theory Appl. 4 (2006), 105-110.

[13] C. H. Lien and K. W. Yu, Nonfragile control for uncertain neutral systems with time-varying delays via the LMI optimization approach, IEEE Trans. System, Man and Cybernetics-Part B 37 (2007), 493-499.

[14] J. L. Lion, Exact controllability, stabilization and perturbations for distributed systems, SIAM Rev. 30 (1988), 1-68.

[15] S. I. Niculescu, memoryless control with an a-stability constraint for time-delay systems: an LMI approach, IEEE Trans. Automat. Control 43 (1998), 739-743.

[16] V. N. Phat, Stabilization of linear continuous time-varying systems with state delays in Hilbert spaces, Electron. J. Differential Equations N-67 (2001), 1-13.

[17] V. N. Phat and P. Niamsup, Stability of linear time-varying delay systems and applications to control problems, J. Comput. Appl. Math. 194 (2006), 343-356.

[18] V. N. Phat and P. Niamsup, Stabilization of linear non-autonomous systems with norm bounded controls, J. Optim. Theory Appl. 131 (2006), 135-149.

[19] V. N. Phat and S. Pairote, Global stabilization of linear periodically time-varying switched systems via matrix inequalities, J. Control Theory Appl. 1 (2006), 24-29.

[20] R. Ravi, K. M. Nagpal and P. P. Khargonekar, control of linear time-varying systems: a state-space approach, SIAM J. Control Optim. 29 (1991), 1394-1413.

[21] A. V. Savkin and I. R. Petersen, Weak robust controllability and observability of uncertain systems, IEEE Trans. Automat. Control 44 (1999), 1037-1041.

[22] U. Shaked and I. Yaesh, static output-feedback control of linear continuous-time systems with delay, IEEE Trans. Automat. Control 43 (1998), 1431-1436.

[23] F. Yang and Q. Zhang, Delay-dependent control for linear descriptor systems with delay in state, J. Control Theory Appl. 1 (2005), 76-84.

[24] H. Zhao, M. Wu, G. Liu and J. She, control for networked control systems (NCS) with time-varying delays, J. Control Theory Appl. 2 (2005), 157-162.