1 |
R. P. Agarwal, Difference Equations and Inequalities, Second Edition, Marcel Dekker, New York, 2000.
|
2 |
M. P. Chen and B. G. Zhang, Oscillation and comparison theorems of difference equations with positive and negative coefficients, Bull. Inst. Math. Acad. Sin. (N.S.) 22 (1994), 295-306.
|
3 |
B. S. Lalli and B. G. Zhang, On existence of positive solutions and bounded oscillations for neutral difference equations, J. Math. Anal. Appl. 166 (1992), 272-287.
DOI
|
4 |
B. G. Zhang and H. Wang, The existence of oscillatory and nonoscillatory solution of neutral difference equation, Chinese J. Math. 24 (1996), 377-393.
|