1. Difference Equations and Inequalities;Agarwal,1992
2. Advanced Topics in Difference Equations;Agarwal,1997
3. Oscillation of higher-order neutral difference equation;Agarwal;Appl. Math. Lett.,1997
4. Oscillation theorems for second order neutral functional differential equations;Grace;Appl. Math. Comput.,1992
5. Oscillation theorems for second order delay and neutral difference equations;Grace;Utilitas Math.,1994