1. Oscillation Theory for Second Order Dynamic Equations;Agarwal,2003
2. Oscillation Theory for Difference and Functional Differential Equations;Agarwal,2000
3. Oscillation Theory for Functional Differential Equations;Erbe,1995
4. Oscillation Theory for Delay Differential Equations with Applications;Gyori,1991
5. Existence of nonoscillatory solution of second order linear neutral delay equation;Kulenovic;J. Math. Anal. Appl.,1998