References
- Foster , K. E. and Grimmer , R. C. 1930 . Nonoscillatory Solutions of Higher Order Delay Equations . J. Math. Anal. Appl , 77 : 150 – 164 .
- Kartsatos , A. G. 1968 . Criteria for Oscittation of Solutions of Differential Equations of Arbitrary Order . Proc. Japan Acad , 44 : 599 – 602 .
- Kartsatos , A. G. and Onose , H. 1972 . On the Maintenance of Oscillations Under the Effect of a Small Nonlinear Damping . Bull. Faculty Sci. Ibaraki Univ. Ser. A , 44 : 1 – 11 .
- Kartsatos , A. G. and Toro , J. 1978 . Comparison and Oscillation Theorems for Equations with Middle Terms of Order n--l . J. Math. Anal.Appl , 66 : 297 – 312 .
- Kiguradge , I. T. 1962 . Oscillation Properties of Solutions of Certain Ordinary Differential Equations . Soviet Math. Dokl. , 144 : 33 – 36 .
- Kosmala , W. A. 1982 . Oscillation and Asymptotic Behaviour of Nonlinear Equations with Middle Terms of Order n-1 and Forcings . Nonlinear Analysis , 6 : 1115 – 1133 .
- Licko , I. and Svec , M. 1963 . Le Caractere Oscillatoire des Solutions de TEcpation yW + f(t)y = 0, n > 1 . Chechoslovak Math. J , 13 : 481 – 489 .
- Onose , R. 1970 . Oscillation Property of Ordinary Differential Equations of Arbitrary Order . J. Diff. Ec. , 7 : 454 – 453 .
- Staikos , V. A. and Sficas , Y. G. 1975 . Forced Oscillations for Differential Equations of Arbitrary Order . J. Diff. Eq. , 17 : 1 – 11 .