@article{Kowalewska-Kudłaszyk:2008,
  author  = "A. Kowalewska-Kudłaszyk and J. Kalaga and W. Leoński",
  title   = "Wigner-function nonclassicality as indicator of quantm chaos",
  journal = "Physical Review E",
  volume  = "Vol. 78",
  number  = "no 6",
  pages   = "066219-1--066219-8",
  year    = "2008",
}