[1] S. BELOHOREC: Oscillatory solutions of certain nonlinear differential equations of second order. Mat. Fyz. Časopis Sloven. Akad. Vied 11 (1961), 250-255. (In Czech.)
[2] I. V. KAMENEV:
Certain specifically nonlinear oscillation theorems. Mat. Zametki 10 (1971), 129-134. (In Russian.)
MR 0287077
[3] M. K. KWONG J. W. W. WONG:
On an oscillation theorem of Belohorec. Siam J. Math. Anal. 14 (1983), 474-476.
MR 0697523
[5] J. S. W. WONG:
A second order nonlinear oscillation theorem. Proc. Amer. Math. Soc. 40 (1973), 487-491.
MR 0318585 |
Zbl 0278.34030
[6] J. W. W. WONG:
On the generalized Emden-Fowler equations. Siaw Rev. 17 (1975), 339-360.
MR 0367368