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2. Applied Theory of Functional Differential Equations;Kolmanovskii,1992
3. Stability and Oscillations in Delay Differential Equations of Population Dynamics;Gopalsamy,1992
4. Control and Observation of Neutral Systems;Salamon,1984
5. Investigation of the stability of linear systems of neutral type by the Lyapunov function method;Khusainov;Differentsialnye Uravneniya,1988