References
- T. A. Chanturia, Integral criteria for the oscillation of higher order differential equations, Differencialnye Uravnenija, 16(1980), 470-482.
- Q. Chuanxi and G. Ladas, Oscillation in differential equations with positive and negative coefficients, Canad. Math. Bull., 33(1990), 442-450. https://doi.org/10.4153/CMB-1990-072-x
- E. M. Elabbasy, A. S. Hegazi and S. H. Saker, Oscillation of solution to delay differential equations with positive and negative coefficients, Electron. J. Differential Equations, 13(2000), 1-13.
- E. M. Elabbasy and S. H. Saker, Oscillation of nonlinear delay differential equations with several positive and negative coefficients, Kyung. Math. J., 39(1999), 367-377.
- L. H. Erbe, Q. Kong and B. C. Zhang, Oscillation theory for functional differential equations, Marcel Dekker, New York, 1995.
- K. Farrell, E. A. Grove and G. Ladas, Neutral delay differential equations with positive and negative coefficients, Appl. Anal., 27(1988), 181-197. https://doi.org/10.1080/00036818808839732
- K. Gopalsamy, S. R. M. Kulenovic and G. Ladas, Oscillations and global attractivity in respiratory dynamics Dynamics and Satability of Systems, 4(2)(1989), 131-139. https://doi.org/10.1080/02681118908806068
- I. Gyori and G. Ladas, Oscillation theory of delay differential equations, Oxford Univ. Press, New York, MR93m: 34109; 1991.
- E. Hile, Nonoscillation theorems, Trans. Amer. Math. Soc., 64(1948), 181-197.
- O. Hiroshi, Oscillatory properties of the first order nonlinear functional differential equations, Proceeding of Dynamic systems and applications, 2(1995), (Atlanta, GA, ), 443-449.
- J. C. Hua and J. Joinshe, Oscillation of solutions of a class of first order nonlinear differential equations with time lag, Acta Math. Sci. (Chinese), 15(4)(1995), 368-375.
- S. R. M. Kulenovic, G. Ladas and A. Meimaridou, On oscillation of nonlinear delay differential equations, Qurt. appl. Math., 45(1987), 155-164. https://doi.org/10.1090/qam/885177
- S. R. M. Kulenovic and G. Ladas, Linearized oscillations in population dynamics, Bull. Math. Biol., 44(1987), 615-627.
- S. R. M. Kulenovic and G. Ladas, Linearized oscillation theory for second order delay differential equations, Canadian Mathematical Society Conference Proceeding, 8(1987), 261-267.
- S. R. M. Kulenovic and G. Ladas, Oscillations of sunflower equations, Qurt. appl. Math., 46(1980), 23-38.
- G. Ladas and C. Qian, Linearized oscillations for odd-order neutral delay differential equations, Journal of Differential Equations, 8(2)(1990), 238-247.
- G. Ladas and C. Qian, Oscillation and global stability in a delay logistic equation, Dynamics and Stability of systems, 9(1991), 153-162.
- B. Li, Oscillation of first order delay differential equations, Proc. Amer. Math. Soc., 124(1996), 3729-3737. https://doi.org/10.1090/S0002-9939-96-03674-X
- Z. Luo and J. Shen, Oscillation and nonoscillation of neutral differential equations with positive and negative coefficients, Czechoslovak Math. J., 54(129)(2004), 79-93. https://doi.org/10.1023/B:CMAJ.0000027249.11074.27
- Y. Norio, Nonlinear oscillation of first order delay differential equations, Rocky Mountain J. Math., 26(1)(1996), 361-373. https://doi.org/10.1216/rmjm/1181072122
- W. Qirui, Oscillations of first order nonlinear delay differential equations, Ann. Differential Equations, 12(1)(1996), 99-104.
- L. Rodica, Oscillatory solutions for equations with deviating arguments, Bull. Inst. Politehn. Iasi. Sect., 36;40(1990), 1-4;41-46.
- G. S. Ruan, Oscillation for first order neutral differential equations with positive and negative coefficients, Bull. Austral. Math. Soc., 43(1996), 147-152.
- J. H. Shen and Z. C. Wang, Oscillation and nonoscillation for a class of nonlinear neutral differential equations, Differential Equations Dynam. Systems, 4(1994), 347-360.
- X. H. Tang and J. H. Shen, Oscillation and existence of positive solution in a class of higher order neutral differential equations, J. Math. Anal. Appl., 213(1997), 662-680. https://doi.org/10.1006/jmaa.1997.5567
- X. H. Tang and J. S. Yu, On the positive solutions of a kind of neutral differential equations with positive and negative coefficients, Acta Math. Sinica, 42(1999), 795-802.
- Wei Jun Jie, Oscillation of first order sublinear differential equations with deviating arguments, Dongbei Shida Xuebao, 3(1991), 5-9 (Chinese).
- G. Xiping, Y. Jun. and C. Sui Sun,.Linearized comparison criteria for a nonlinear neutral differential equations, Ann. Polon. Math., 64(2)(1996), 161-173. https://doi.org/10.4064/ap-64-2-161-173
- J. S. Yu. and Z. C. Wang, Some further results on oscillation of neutral differential equations, Bull. Austral. Math. Soc., 46(1992), 149-157. https://doi.org/10.1017/S0004972700011758
- J. S. Yu and J. R. Yan, Oscillation in first order neutral differential equations with (integrally small) coefficients, J. Math. Anal. Appl., 187(1994), 361-370. https://doi.org/10.1006/jmaa.1994.1362
- B. G. Zhang and B. Yang, New approach of studying the oscillation of neutral differential equations, Funkcial. Ekvac., 41(1998), 79-89.
- B. G. Zhang and J. S. Yu, Oscillation and nonoscillation for neutral differential equations, J. Math. Anal. Appl., 172(1993), 11-23. https://doi.org/10.1006/jmaa.1993.1002