@misc{indiciae1b901a46f5ac,
  title = {Condition for a bivariate normal probability distribution in phase space to be a quantum state.},
  author = {J Krüger},
  year = {1992},
  doi = {10.1103/physreva.46.5385},
  url = {https://pubmed.ncbi.nlm.nih.gov/9908785/},
  note = {Source identifier: 9908785}
}