@misc{indiciaeb034e03abed3,
  title = {The ring sign.},
  author = {O Konez},
  year = {1998},
  doi = {10.1148/radiology.207.2.9577493},
  url = {https://pubmed.ncbi.nlm.nih.gov/9577493/},
  note = {Source identifier: 9577493}
}