1. Difference Equations: An Introduction With Applications;Kelley,1991
2. Difference Equations and Inequalities;Agarwal,1992
3. Global Behavior of Nonlinear Difference Equations of Higher Order With Applications;Kocic,1993
4. An Introduction to Difference Equations;Elaydi,1996
5. Dynamics of Second Order Rational Difference Equations; With Open Problems and Conjectures;Kulenović,2001