@misc{indiciaec224087c2e20,
  title = {Polychromatic polarization singularities.},
  author = {Isaac Freund},
  year = {2003},
  doi = {10.1364/ol.28.002150},
  url = {https://pubmed.ncbi.nlm.nih.gov/14649924/},
  note = {Source identifier: 14649924}
}