@misc{indiciaeac91882b90ee,
  title = {A peculiar optical phaenomenon.},
  author = {M Swanston and N Wade},
  year = {1994},
  doi = {10.1068/p231107},
  url = {https://pubmed.ncbi.nlm.nih.gov/7899026/},
  note = {Source identifier: 7899026}
}