@InProceedings{chassande-mottin98,
  author        = {Chassande-Mottin, E. and Flandrin, P.},
  title         = {On the stationary phase approximation of chirp spectra},
  booktitle     = "Proc. of the IEEE Int. Symp. on Time-Frequency and
Time-Scale Analysis",
  year          = 1998,
  address       = {Pittsburgh (US)},
  pages         = {117--120}
}