A new sufficient condition for periodic solutions of weakly nonlinear differential systems

Cesari, L.; Hale, J. K.

doi:10.1090/S0002-9939-1957-0086209-2

A new sufficient condition for periodic solutions of weakly nonlinear differential systems
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by L. Cesari and J. K. Hale

Proc. Amer. Math. Soc. 8 (1957), 757-764

DOI: https://doi.org/10.1090/S0002-9939-1957-0086209-2

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References

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