@article{Leoński:2003,
  author  = "W. Leoński and A. Miranowicz and K. Piątek",
  title   = "Classical information entropy for single and two mode quantum fields",
  journal = "Proceedings of SPIE",
  volume  = "Vol. 5259",
  pages   = "37--41",
  year    = "2003",
}