1. Some Problems in the Theory of Stability;Krasovskii,1959
2. Linear Differential Equations with Delay Argument;Myshkis,1972
3. Introduction to the Theory and application of Differential Equations with Deviating Argument;Ee′sgol’ts,1973
4. Stability and Periodic Modes of Control Systems with After effect;Kolmanovskii,1981
5. The Stability of Hereditary Systems;Razumikhin,1988