@article{Arkhipov:2018,
  author  = "I. Arkhipov and A. Barasiński and J. Svozilík",
  title   = "Negativity volume of the generalized Wigner function as an entanglement witness for hybrid bipartite states",
  journal = "Scientific Reports",
  volume  = "Vol. 8",
  pages   = "1--11",
  year    = "2018",
}