共 25 条
[1]
Agarwal R., 2008, Commun. Appl. Anal, V12, P83
[2]
[Anonymous], MATH ITS APPL
[4]
Beckenbach E. F., 1961, Inequalities
[8]
Gopalsamy K., 2013, STABILITY OSCILLATIO, V74
[9]
Halanay A., 1966, Differential equations: Stability, Oscillations and Time Lags, V6

