Asymptotic approximations of first integrals for a nonlinear oscillator.

5 1 10 Asymptotic approximations of first integrals for a nonlinear oscillator. St.Budi Waluya Additional Author W.T. van Horssen Additional Author mixed material Netherlands DELFT 2002 On approximations of first integrals for a system of weakly nonlinear, coupled harmonic oscillators. St.Budi Waluya Additional Author W.T. van Horssen Additional Author mixed material Netherlands Kluwer Academic 2002 On approximations of firs integrals for strongly nonlinear oscillators. St.Budi Waluya Additional Author W.T.van Horssen Additional Author mixed material Netherlands DELFT 2003 On approximations of First Integrals for a Strongly Nonlinear Forced Oscillator. St.Budi Waluya Additional Author W.T.van Horssen Additional Author mixed material Netherlands Kluwer Academic Publishers 2003 On the periodic solutions of a generalized non-linear Van der Pol oscillator. St.Budi Waluya Additional Author W.T.van Horssen Additional Author mixed material Netherlands DELFT 2003