References
- Erbe , L. H. and Zhang, , B. C. 1989 . Oscillation of discrete analogue of delay equations, . Differential and Integral Equations J., , 2 : 300 – 309 .
- Gyori , I. and Ladas, , G. 1989 . Linearized oscillations for equations with piecewise constant arguments, . Differential and Integral Equations J., , 2 : 123 – 131 .
- Philos , CH.G. and Sficas, , Y.G. Sharp conditions for the oscillation of delay difference equations . J.Appl.Math. Simulatian ,
- Ladas, , G. 1990 . Recent developments in the oscillation of delay diffreence equations, . International Conference on Differential equations: Stability and Control, Marcel Dekker, ,
- Explicit conditions for the oscillation of difference equations, . J. Math. Anal. Appl., ,