Title of article :
A note on the Poincaré—Birkhoff fixed point theorem and periodic solutions of planar systems Original Research Article
Author/Authors :
Carlota Rebelo، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1997
Keywords :
Poincaré—Birkhoff fixed point theorem , periodic solutions of planar systems
Journal title :
Nonlinear Analysis Theory, Methods & Applications
Journal title :
Nonlinear Analysis Theory, Methods & Applications