[1] BRADLEY J. S.:
Oscillation theorems for a second order delay equation. J. Diff. Equations 8, 1970, 397-403.
MR 0268482 |
Zbl 0212.12102
[2] GUSTAFSON G. B.:
Bounded oscillations of linear and nonlinear delay-differential equations of even order. J. Math. Anal, and Appl. 46, 1974, 175-189.
MR 0346275 |
Zbl 0282.34027
[3] LADA G., LAKSHMIKANTHAM V.:
Oscillations caused by retarded actions. Applicable Analysis 4, 1974, 9-15.
MR 0430470
[4] ODARIČ O. N., SEVELO V. N.:
Some problems in the theory of oscillation of second order differential equations with deviating arguments. Ukrainian Math. J. 23, 1971, 508-516.
MR 0289901
[5] ODARIČ O. N., SEVELO V. N.:
The non-oscillations of solutions of non-linear second differential equations with retarded argument. Trudy Sem. Mat. Fiz. Nelin. Kolebanij 1, 1968, 268-279.
MR 0283346
[6] STAIKOS V. A., PETSOULAS A. G.:
Some oscillation criteria for second order non-linear delay differential equations. J. Math. Anal. Appl. 30, 1970, 695-701.
MR 0257521
[7] STAIKOS V. A.:
Oscillatory property of a certain delay differential equation. Bull. Soc. Math. Grese 11, 1970, 1-5.
MR 0336008
[8] ŠOLTÉS P.:
Oscillatory properties of solutions of second order non-linear delay differential equations. Math. Slovaca 31, 1981, 207-215.
MR 0611634
[9] OHRISKA J.:
The argument delay and oscillatory properties of differential equation of n-th order. Czech. Math. J. 29 (104), 1979, 268-283.
MR 0529514 |
Zbl 0396.34058