On harmonic and subharmonic solutions of nonlinear second order equations: symmetry and bifurcation

References

• Chow , S.N. and Hale , J.K. 1982 . Methods of Bifurcation Theory , London Heidelberg-Berlin-Tokio : Springer-Verlag .
   Google Scholar
• Furkotter , M. and Rodrigues , H.M. 1986 . Periodic solutions of forced nonlinear second order equations . symmetry and bifurcations starf; SIAM J. Math. Anal. , 17 : 1319 – 1331 .
   Google Scholar
• Furkotter , M. and Rodrigues , H.M. 1989 . Sobre Bifurcacao e Simetria de So lucoes Periodicas de Equagoes Diferenciais Nao Lineares . Doctoral Thesis. ICMSC-USP , 17
   Google Scholar
• Hale , J.K. 1980 . Ordinary Differential Equations , New York : Krieger .
   Google Scholar
• Hale , J.K. and Rodrigues , H.M. 1977 . Bifurcation in the Duffing Equation with independent parameters II . Proc. Royal Soc. Edinburgh A , 79 : 317 – 326 .
   Google Scholar
• Rodrigues , H.M. and Vanderbauwhede , A. 1978 . Symmetric perturbations of nonlinear equations: symmetry of small solutions . Nonlinear Anal. TMA , 2 : 27 – 46 .
   Google Scholar
• Vanderbauwhede , A. 1982 . Local Bifurcation and Symmetry , Boston-London-Melbourne : Pitman Advanced Publishing Program .
   Google Scholar