1. Oscillation Theory of Differential Equations with Deviating Arguments;Ladde,1987
2. Oscillation Theory for Neutral Differential Equations with Delay;Bainov,1991
3. Oscillation Theory of Delay Differential Equations;Györi,1991
4. Oscillation Theory for Functional Differential Equations;Erbe,1995
5. Oscillation Theory for Difference and Functional Differential Equations;Agarwal,2000