@article{26359,
  author       = {{Vogel, W. and Kiesel, T. and Sperling, Jan}},
  issn         = {{0030-400X}},
  journal      = {{Optics and Spectroscopy}},
  pages        = {{197--205}},
  title        = {{{Characterizing nonclassicality and entanglement}}},
  doi          = {{10.1134/s0030400x10020074}},
  year         = {{2010}},
}