[1] ERBE L.:
Oscillation criteria for second order nonlinear delay equations. Canad. Math. Bull. 16 (1), 1973, 49-56.
MR 0324173 |
Zbl 0272.34095
[2] OДAPИЧ O. H., ШEБEЛO B. H.: Heкoтopыe вonpocы acимптoтичecкoгo пoвeдeния peшeний нeлинeйныx дифф. ypaв. c зanaздывaющим apгyментoм. Дифф. ypaв. Toм IX, 1973, K24, 637-646.
[3] OHRISKA J.:
Oscillation of n-th ordeг linear and nonlinear delay differential еquations. Czech. Math. J. 32 (107), 1982, 271-274.
MR 0654061
[4] OHRISKA J.:
Asymptotic properties of solutions of a second order nonlinear delay differential equation. Math. Slovaca 31, 1981, 83-90.
MR 0619510 |
Zbl 0461.34055
[5] OHRISKA J.:
The aгgument delay and oscillatory properties of differential equation of n-th oгdeг. Czech. Math. J. 29 (104), 1979, 268-283.
MR 0529514
[6] OHRISKA J.:
Oscillation of second order delay and ordinary differеntial equation. Czech. Math. J. 34 (109), 1984, 107-112.
MR 0731983
[7] ONOSE H.:
Oscillation and asymptotic behaviour of solutions of retarded diff. equations of arbitrary order. Hirosh. Math. J. 3, 1973, 333-360.
MR 0348231