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Existence of periodic orbits of autonomous ordinary differential equations. (English) Zbl 0429.34040


MSC:

34C25 Periodic solutions to ordinary differential equations
34A34 Nonlinear ordinary differential equations and systems
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[1] DOI: 10.1007/978-1-4612-6374-6
[2] Hartman, Ordinary Differential Equations (1964) · Zbl 0125.32102
[3] Burkin, Sibirsk. Mat. Ž. 18 pp 251– (1977)
[4] Barnett, Matrix Methods in Stability Theory (1970) · Zbl 0243.93017
[5] Nemytskii, Qualitative Theory of Differential Equations (1960)
[6] Reissig, Nonlinear Differential Equations of Higher Order (1974)
[7] DOI: 10.1080/00207177108931977 · Zbl 0219.93014
[8] Newman, Elements of the Topology of Plane Sets of Points (1951) · Zbl 0045.44003
[9] Smith, Proc. Roy. Soc. Edinburgh Sect. 83 pp 63– (1979) · Zbl 0408.34042
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