@article{Leoński:1996,
  author  = "W. Leoński",
  title   = "Fock states in a Kerr medium with parametric pumping",
  journal = "Physical Review A",
  volume  = "Vol. 54",
  number  = "no 4",
  pages   = "3369--3372",
  year    = "1996",
}