참고문헌
- R.P. Agarwal and S.R. Grace, Forced oscillation of nth order nonlinear differential equations, Appl. Math. Lett. 13 (2000), 53-57.
- B. Baculikova and J. Dzurina, Oscillation of third-order neutral differential equations, Math. Computer Modelling 52 (2010), 215-226. https://doi.org/10.1016/j.mcm.2010.02.011
- S.H. Saker, Oscillation of second order neutral delay differential equations of Emden-Fowler type, Acta Mathematica Hungarica 100 (2003), 37-62. https://doi.org/10.1023/A:1024699900047
- J.G. Dong, Oscillation behavior of second order nonlinear neutral differential equations with deviating arguments, Computers Math. Appl. 59 (2010), 3710-3717. https://doi.org/10.1016/j.camwa.2010.04.004
- J. Dzurina, J. Busha and E.A. Airyan, Oscillation criteria for second-order differential equations of neutral type with mixed arguments, Diff. Equs. 38 (2002), 137-140. https://doi.org/10.1023/A:1014872030186
- L.H. Erbe and Q. Kong, Oscillation results for second order neutral differential equations, Funkcialaj Ekvacioj 35 (1992), 545-555.
- A. Erdelyi, Asymptotic Expansions, Dover, New York, 1956.
- S.R. Grace, On the oscillations of mixed neutral equations, J. Math. Anal. Appl. 194 (1995), 377-388. https://doi.org/10.1006/jmaa.1995.1306
- S.R. Grace, Oscillations of mixed neutral functional-differential equations, Appl. Math. Comput. 68 (1995), 1-13. https://doi.org/10.1016/0096-3003(94)00075-F
- I. Gyori and G. Ladas, Oscillation Theory of Delay Differential Equations, Clarendon Press, Oxford, 1991.
- M. Hasanbulli and Y. V. Rogovchenko, Oscillation criteria for second order nonlinear neutral differential equations, Appl. Math. Comput. 215 (2010), 4392-4399. https://doi.org/10.1016/j.amc.2010.01.001
- L. Liu and Y. Bai, New oscillation criteria for second-order nonlinear neutral delay differential equations, J. Comput. Appl. Math. 231 (2009), 657-663. https://doi.org/10.1016/j.cam.2009.04.009
- C.H. Ou and J.S.W. Wong, Forced oscillation of nth-order functional differential equations, J. Math. Anal. Appl. 262 (2001), 722-732. https://doi.org/10.1006/jmaa.2001.7614
- Y.G. Sun and J.S.W. Wong, Note on forced oscillation of nth-order sublinear differential equations, J. Math. Anal. Appl. 298 (2004), 114-119. https://doi.org/10.1016/j.jmaa.2004.03.076
- Y.G. Sun and A.B. Mingarelli, Oscillation of higher-order forced nonlinear differential equations, Appl. Math. Comput. 190 (2007), 905-911. https://doi.org/10.1016/j.amc.2007.01.083
- Q. Wang, Oscillation theorems for first-order nonlinear neutral functional differential equations, Computers Math. Appl. 39 (2000), 19-28.
- R. Xu and F. Meng, Oscillation criteria for second order quasi-linear neutral delay differential equations, Appl. Math. Comput. 192 (2007), 216-222. https://doi.org/10.1016/j.amc.2007.01.108
- J. Yan, Oscillations of higher order neutral differential equations of mixed type, Israel J. Math. 115 (2000), 125-136. https://doi.org/10.1007/BF02810583
- X. Yang, Forced oscillation of n-th nonlinear differential equations, Appl. Math. Comput. 134 (2003), 301-305. https://doi.org/10.1016/S0096-3003(01)00284-3
- Q. Zhang, J. Yan and L. Gao, Oscillation behavior of even-order nonlinear neutral differential equations with variable coefficients, Computers Math. Appl., 59 (2010), 426-430. https://doi.org/10.1016/j.camwa.2009.06.027