1. J.-S. Yu, “Asymptotic Stability for a Linear Difference Equation with Variable Delay,” Comput. Math. Appl. 36(10–12), 203–210 (1998).
2. V. V. Malygina and A. Y. Kulikov, “On Precision of Constants in Some Theorems on Stability of Difference Equations,” Funct. Differ. Equat. 15(3–4), 239–248 (2008).
3. L. Berezansky and E. Braverman, “On Existence of Positive Solutions for Linear Difference Equations with Several Delays,” Adv. Dyn. Syst. Appl. 1(1), 29–47 (2006).
4. A. Yu. Kulikov and V. V. Malygina, “Stability of Nonautonomous Difference Equations with Several Delays,” Izv. Vyssh. Uchebn. Zaved. Mat., No. 3, 18–26 (2008) [Russian Mathematics (Izv. VUZ) 52 (3), 15–23 (2008)].
5. L. H. Erbe and H. Xia, “Global Stability of a Linear Nonautonomous Delay Difference Equation,” J. Differ. Equat. Appl. 1(2), 151–161 (1995).