1. Dugart, L., and Verriest, E. I., 1997, Stability and Control of Time-Delay Systems, Springer-Verlag, New York.
2. Hale, J. K., and Lunel, S. M. V., 1993, Introduction to Functional Differential Equations, Springer-Verlag, New York.
3. Kolmanovskii, V. B., Niculescu, S. I., and Gu, K., 1999, “Delay Effects on Stability: A Survey,” Proc. of 38th IEEE Conf. on Decision and Control, Phoenix, AZ, pp. 1993–1998.
4. Malek-Zavarei, M., and Jamshidi, M., 1996, Time Delay Systems, North Holland, Amsterdam.
5. Ortega, R., and Lozano, R., 1988, “Globally Stable Adaptive Controller for Systems With Delay,” Int. J. Control, 47(1), pp. 17–23.