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