@misc{indiciae499a29cd2814,
  title = {Comment on "Local observations of phase singularities in optical fields in waveguide structures".},
  author = {B Vohnsen and S I Bozhevolnyi},
  year = {2001},
  doi = {10.1103/physrevlett.87.259401},
  url = {https://pubmed.ncbi.nlm.nih.gov/11736614/},
  note = {Source identifier: 11736614}
}