@article{Cao Long:2004,
  author  = "V. Cao Long and P. Goldstein and M. Trippenbach",
  title   = "On existence of solitons for the 3rd harmonic of a light beam in planar waveguides",
  journal = "Acta Physica Polonica A",
  volume  = "Vol. 105",
  number  = "no 5",
  pages   = "437--444",
  year    = "2004",
}