@misc{indiciaeda32a74c0621,
  title = {Phase measurement and Q function.},
  author = {U Leonhardt and H Paul},
  year = {1993},
  doi = {10.1103/physreva.47.r2460},
  url = {https://pubmed.ncbi.nlm.nih.gov/9909347/},
  note = {Source identifier: 9909347}
}