Periodic solutions of singular second order differential equations: Upper and lower functions

  1. Hakl, R.
  2. Torres, P.J.
  3. Zamora, M.
Journal:
Nonlinear Analysis, Theory, Methods and Applications

ISSN: 0362-546X

Year of publication: 2011

Volume: 74

Issue: 18

Pages: 7078-7093

Type: Article

DOI: 10.1016/J.NA.2011.07.029 GOOGLE SCHOLAR

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