1. Introduction to Functional Differential Equations;Hale,1993
2. Time delay systems: analysis;Zavarei,1987
3. Delay Effects on Stability: A Robust Control Approach;Niculescu,2001
4. Applied Theory of Functional Differential Equations;Kolmanovskii,1992
5. An improved stabilization method for linear time-delay systems;Fridman;IEEE Transactions on Automatic Control,2002