1. Difference Equations and Inequalities;Agarwal,1992
2. An Introduction to Difference Equations;Elaydi,2005
3. Sturmian comparison method in the oscillation study for discrete difference equations I;Domshlak;Differential Integral Equations,1994
4. Subdominant positive solutions of the discrete equation Δu(k+n)=−p(k)u(k);Baštinec;Abstr. Appl. Anal.,2004
5. On existence of positive solutions for linear difference equations with several delays;Berezansky;Adv. Dyn. Syst. Appl.,2006