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Le caractère oscillatoire des solutions de l'équation $y\sp{(n)} +f(x) y\sp{\alpha} =0, n>1$. Czech. Math. J. 13 (1963), 481-491.
MR 0161001 |
Zbl 0123.28202
[3] J. Ohriska:
Sufficient conditions for the oscillation of $n$-th order nonlinear delay differential equation. Czech. Math. J. 30 (105), (1980), 490-497.
MR 0583628 |
Zbl 0443.34069