@misc{indiciae7dfb8144c859,
  title = {Simple simulated human head for checking echoencephalographic equipment.},
  author = {A C Hudson and J L Bradley},
  year = {1973},
  doi = {10.1007/bf02475549},
  url = {https://pubmed.ncbi.nlm.nih.gov/4746393/},
  note = {Source identifier: 4746393}
}