@misc{indiciaea47488bcc9fa,
  title = {Titanium Riechert head ring for MR stereotaxy. Technical note.},
  author = {C B Ostertag and L R Schad and R Koch and R Maier and B Wowra},
  year = {1993},
  doi = {10.1007/bf01405188},
  url = {https://pubmed.ncbi.nlm.nih.gov/8475813/},
  note = {Source identifier: 8475813}
}