@misc{indiciaeca901d0ebffa,
  title = {Self-retaining costal arch retractor.},
  author = {F W Braastad},
  year = {1970},
  doi = {10.1016/0002-9610(70)90070-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5443943/},
  note = {Source identifier: 5443943}
}