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Keywords:
positive periodic solutions; existence; neutral delay system
positive periodic solutions; existence; neutral delay system
Summary:
References:
[1] Y. Kuang: Delay Differential Equations with Applications in Population Dynamics. Academic Press, New York, 1993. MR 1218880 | Zbl 0777.34002
[2] H. I. Freedman and J. Wu: Periodic solutions of single-species models with periodic delay. SIAM J. Math. Anal. 23 (1992), 689–701. MR 1158828
[3] L. Erbe, W. Krawcewicz and J. Wu: A composite coincidence degree with applications to boundary value problems of neutral equations. Trans. Amer. Math. Soc. 335 (1993), 459–478. MR 1169080
[4] W. Krawcewicz and J. Wu: Theory of Degrees with Applications to Bifurcations and Differential Equations. John Wiley & Sons, Inc., New York, 1996. MR 1426128
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