@misc{indiciae5cb417a6d41f,
  title = {Circling optical vortices.},
  author = {M Vaupel and CO Weiss},
  year = {1995},
  doi = {10.1103/physreva.51.4078},
  url = {https://pubmed.ncbi.nlm.nih.gov/9912082/},
  note = {Source identifier: 9912082}
}