共 32 条
[3]
Agarwal RP., 2000, Oscillation Theory for Difference and Functional Differential Equations
[4]
[Anonymous], 2006, IMPULSIVE DIFFERENTI
[5]
Bainov D., 1993, PITMAN MONOGRAPHS SU
[6]
Beckenbach E., 1961, Inequalities
[7]
ERBE L.H., 1995, OSCILLATION THEORY F
[10]
Gyori I., 1991, OSCILLATION THEORY D