Title of article :
Invariance of homotopy and an extention of a theorem by Habets–Metzen on periodic solutions of Duffing equations
Original Research Article
Author/Authors :
Yu Jun Dong، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Journal title :
Nonlinear Analysis Theory, Methods & Applications
Journal title :
Nonlinear Analysis Theory, Methods & Applications