1. J.K. Hale, Theory of Functional Differential Equations, Springer-Verlag, New York, 1977.
2. V.V. Kolmanovskii, V.R. Nosov, Stability of Functional Differential Equations, Academic Press, New York, 1986.
3. On linear impulsive systems for functional differential equations;Anokhin;Soviet Math. Dokl.,1986
4. On delay differential equations with impulses;Gopalsamy;J. Math. Anal. Appl.,1989
5. Exponential stability of linear delay impulsive differential equations;Anokhin;J. Math. Anal. Appl.,1995